ELI - European Legislation Identifier

1. INTRODUCTION

The European area of freedom, security and justice requires the knowledge of European law, but also mutual knowledge of the legal systems of other Member States. For this reason, in the year 2012, the European Union adopted an interoperability initiative specifically focused on legislative information by means of the Council Conclusions (2012/C 325/02) inviting Member States to adopt a standard for the identification and description of legislative rules called the "European Legislation Identifier".

Although there is much legal information available on the Internet, the accessibility and interoperability are limited by the differences in the national legal systems as well as by the existing differences in the technical systems used to store and present the legislation in the national websites.

In this context, the European Legislation Identifier (ELI) aims to facilitate the access, exchange and interconnection of the information published in the European, national and global information systems, in order to enable the setting of a genuine network of legal information, available as open data and reusable.

The European Legislative Identifier is used for:

• Identify legislation with a steady and unique identifier, recognizable and understandable by people and machines.
• Describe legislation with a set machine readable metadata elements, in compliance with a recommended ontology.

The advantages of the ELI system are multiple:

1. promotes interoperability between legal systems, thus facilitating cooperation on legal matters between national administrations and contributing to the creation of the European Union's area of freedom, security and justice;
2. acts as a driver for transparency and openness, reinforcing the legitimacy and accountability of the Member States that use it.
3. allows users to manually compose ELI URIs, providing them with a faster and easier way to access the legislation they are looking for.
4. makes searching across legislation in different legal systems more efficient for citizens and legal professionals.
5. improves effectiveness of legal publishing workflows, thus leading to better quality and reliability of legislation as well as cost savings for legal publishers.
6. allows the smart reuse of legal data and creates opportunities for the development of new services by the private sector, thus contributing to the development of the Digital Single Market.

The ELI's system is structured in three cornerstones:

a) Pillar 1: unique identifiers

ELI offers a way to univocally identify, name and access national and European legislation, readable both by people and computer systems and compatible with current technological standards.

b) Pillar 2: properties that describe each legislative act according to an ontology

While a structured URI can already identify acts using a set of defined components, the attribution of additional metadata established in the framework of a shared syntax will set the basis to promote interchange and enhance interoperability between legal information systems. By identifying the metadata describing the essential characteristics of a resource, Member States will be able to reuse relevant information processed by others for their own needs, without having to put into place additional information systems.

An ontology represents a formal description of a set of concepts and the relations in a given domain. By describing the properties of legislation and the relations between the different concepts, a shared understanding is made possible so ambiguities between terms can be avoided. Being a formal specification, it is directly machine-processable.

Therefore, while Member States are free to use their own metadata schema, they are encouraged to follow and use ELI metadata standards with shared but extensible authority tables, which permit to meet specific requirements. ELI metadata schema is intended to be used in combination with customized metadata schemas.

c) Pilar 3: render the ELI metadata machine-reusable

ELI allows a wider and faster data exchange: when the metadata are integrated in the corresponding webpages of the different official gazette or legal information systems, the information can be exchanged efficiently and automatically thanks to the benefits of the emerging semantic network architecture, that makes it possible for the information to be processed directly both by computers and by people.

For the data exchange to become more efficient, ELI metadata elements may be classified in compliance with the W3C Recommendation "RDFa in XHTML: Syntax and Processing'. Member States may add other classification formats apart from RDFa.

Since 2012, ELI system has been adopted by a series of European countries (Austria, Belgium, Denmark, Finland, France, Ireland, Italy, Luxembourg, Norway, Portugal, United Kingdom) and by the Publications Office of the EU, with different intensity according to the progressive approach that characterizes this identifier (only pillar 1, pillars 1 and 2 or the three pillars).

The system's success has motivated that on 6 November 2017, the Council have adopted new Conclusions about ELI^[1], encouraging again the Member States and candidate states, the Lugano States and other states to adopt the identifier voluntarily and gradually.

2. APPLICATION OF THE ELI IN SPAIN

2.1 The advantages for Spain

The Spanish legal system is a complex and plural reality. It is integrated by rules corresponding to three different territorial levels (state, autonomic and local). However, despite the fact that these rules constitute a system and that they are related to each other, there are differences in the technical systems used to store and present legislation in each legal information system. This makes access to law more difficult for legal practitioners, companies and citizens and hampers the connection among legal information systems.

In fact, if a person wants to know the legislation about any matter in Spain, it is not enough to check the state or regional regulations, but it is needed to check both and, in many cases, also the European or local regulations. However, the search of legal information corresponding to different territorial levels is costly and difficult, to the extent that the State, the Autonomous Communities and the local entities databases in which the most relevant legal information is located, are not related to each other. It requires to look up several databases or, at worst, if one is interested in the different regional or local legislations, to make searches through every one of them.

Therefore, the ELI implementation in Spain is especially relevant, since, in addition to the benefits that ELI provides at the European level, there would be, internally, a significant improvement in the access to legal information and in the interoperability between the legal information systems of the different territorial levels.

2.2 Legal and technical aspects that determine the implementation

ELI is a flexible system, designed to adapt to the complexity and specificity of the different regional, national and European legal systems, as well as the changes that occur in legal resources.

In the Spanish case, the implementation must take into account the plurality and diversity that characterizes the Spanish legal system, much higher than the one presented by the European countries that up to now have implemented the identifier:

a) Plurality of issuing territorial levels and official gazettes

Each of the territorial level with legislative and regulatory powers has its own Official Gazette:

• The «Spanish Official Gazette» (BOE) publishes the international law, state rules and also regional laws, in compliance with the provisions of the different Statutes of Autonomy.
• The seventeen Autonomic Gazettes publish the regional rules. Additionally, there are two specific Gazettes for the Autonomous Cities of Ceuta and Melilla.
• The local rules are published, either in one of the seven official gazettes corresponding to those Autonomous Communities with one province, or in the corresponding Provincial Gazette (43 at the moment).

All the official gazettes are electronically published with digital signature, as a guarantee of its authenticity and integrity; the documents published are offered in a plurality of formats (mostly pdf and html and occasionally xml and e-pub). Many Official Gazettes publish each rule as a single electronic document; others offer a pdf with the complete issue of the day, with all the rules and acts published.

b) Linguistic variety

As for the language, each Official Gazette is published in its corresponding official language: only in Spanish or in two languages in the case of those public administrations that have their own language^[2].

Regarding the State Official Gazette (Boletín Oficial del Estado / BOE), it is published in Spanish, although, in accordance to the Royal Decree 489/1997^[3], there are four supplements in co-official languages in compliance with the agreements signed with the Autonomous Communities of the Basque Country, Catalonia, Galicia and Valencia.

c) Plurality of publications

Some rules are officially published in two gazettes:

• - Autonomic Laws (Acts passed by the Autonomic Parliaments) are published in the BOE once they have been published in the autonomic official gazette. Sometimes, the Statute of Autonomy also foresees the double publication for the rest of the legislation with the rank of law or for some types of them. However, the entry into force of the autonomic regulations takes place by virtue of its publication in the corresponding regional official gazette, not in the BOE^[4].
• - In some specific cases, some state legislation is published in the autonomic official gazette (for example, the Royal Decrees about the distribution of powers)^[5].

d) Multiplicity of legal information systems

ELI applies to legal resources available in the official databases of Member States.

The State, the Autonomous Communities and the local bodies have their own legal information systems. Usually, these database systems are available in the website in which the corresponding official gazette is hosted and allow to retrieve the published legislation, although sometimes the time scope considered is not complete. The information is offered in pdf and html format and less frequently in xml.

It is relatively common for official databases to offer legislation corresponding to other territorial levels, even if they have not been published in the official gazette that corresponds to the managing entity (for example, autonomic databases that also offer certain state legislation).

The consolidated law databases^[6] offered mainly by the State and some Autonomous Communities reuqiers a special comment, as their management is quite different:

• Regarding the ownership of the service, there are consolidated law databases available in the official gazettes website itself (BOE, DOCM, DOGV) and databases available on other webs different from those of the Official Gazette: in some cases they are managed by the same entity (for example, the EADOP in Catalonia), by a different entity or body (as in the cases of Canary Islands, Balearic Islands or Galicia) or even by a private company with which the service has been contracted (and in this case there is no uniformity either, depending on the communities, the website is either that of the brand of the company or that of the autonomous community itself).
• In relation to search engines, these are different when the websites of the official gazette and the consolidated legislation are different: however, sometimes, even when all the information is hosted in the Official Gazzete website, there are independent databases.
• As to the consolidation activity itself, in some administrations the consolidated versions are prepared by themselves and in other cases they have been contracted with a company that, depending on the cases, only provides the texts or also the search engine.

The situation of the databases of the Official Gazettes of the Provinces, which are dependent on the Provincial Councils, is very different and sometimes it is the corresponding local body itself, that depending on its technical resources, is in charge of the online publishing of their own regulations, being rare that they offer them in a consolidated version.

e) Plurality of metadata

The technological situation of the diverse official bodies that offer legal resources on line is very varied. Due to this, the metadata range in the different websites is unequal: not all the administrations have metadata and, if they exist, they are not uniform, either because they do not match, because they are not named equal or because they are not defined in the same way.

3. PURPOSE AND SCOPE OF THE TECHNICAL SPECIFICATION FOR THE IMPLEMENTATION OF ELI

The ELI system offers a flexible standard for the access to and identification of legislation, which has to be adapted to the particularities of the different regional, national and international legislative systems.

Due to the plurality of the Spanish legal system, the implementation of the identifier must be carried out in a coordinated way by all public administrations, following the philosophy defined by the "National Interoperability Scheme", which takes into account the European Union recommendations.

Thus, the public administrations have taken part in the development of the technical specification within the framework of the Sectoral Commission for e-government (Comisión Sectorial de Administración Electrónica / CSAE).

According to the gradual approach that defines ELI and that has been followed by all the European countries, the implementation in Spain will take place in various phases.

In the first phase, the ELI specification was defined for the state and autonomic legislation, by the agreement of the CSAE of 13 March 2018.

The complexity of the local legislation and the different technological situations regarding the provincial official gazettes and public bodies recommended approaching the application of the identifier to the local legislation in a second phase.

Consequently, a new version of the technical specification tackling the application of ELI to all legislation, either state, autonomic or local, has been developed. A specific addendum has been included in the text approved by the CSAE in 2018, which adapts to the legal and technical particularities of the local field.

This specification aims to establish the common guidelines required by the implementation of ELI in the Spanish context, so that the identification and description of the legal resources are performed in a coordinated and coherent way by the different public administrations.

As ELI is designed to work on the basis of existing systems, each public administration can maintain its own official gazette and legislative databases as appropriate, as well as the internal management processes that meet their needs, criteria and own regulations. The specifications include only the minimum elements necessary to guarantee the interoperability of the legal information that the different Spanish public administrations offer on the Internet.

This technical specification, applicable to all national legislation, defines:

• the ELI URI template as well as its components (Pillar n.1).
• a set of minimum common metadata (Pillar n.2).

In any case, the guidelines for this technical specification have been designed in such a way that allow its development and improvement over time, through the expansion of the minimum common metadata, and its adaptation to the evolution of the ELI ontology, until the adoption of the three pillars is completed.

According to the Council conclusions of 6 November 2017, all the public administrations (state, regional or local) which apply or which are planning to adopt the identifier, must have available a webpage containing all the information about the project.

In compliance with this, since July 2018, the ELI Working Group of CSAE maintains the common webpage https://www.elidata.es/. It also offers technical resources for the identifier's application, as well as the link to the respective webpages of the different public administrations with the information about their implementation. The availability and sharing of all this information eases the coordination at the national level and provides the knowledge about previous experiences of implementation developed by other entities.

4. APPLICATION RANGE OF THE TECHNICAL SPECIFICATION FOR THE IMPLEMENTATION OF ELI

4.1 Legislative scope

The Council Conclusions invite Member States to apply the ELI to national legislation units, giving them space to decide to which rules the identifier will apply and to do it progressively^[7].

However, according to the literal meaning of the term "units of national legislation", the following legal resources will not be taken into consideration:

• Supranational legislation, that is, European legislation. This legislation is published exclusively in the DOUE. It should be pointed out that the Publications Office of the EU has already implemented the ELI for the European legislation^[8].
• The decisions issued by the courts, both by the constitutional and ordinary jurisdiction, since they don't have a legislative character. The ELI does not apply to case law, but a specific European Identifier named ECLI (European Case Law Identifier)^[9].

The State and the Autonomous Communities will apply ELI to those rules and resolutions that belong to their corresponding legislative databases^[10]. With regard to international agreements, they will be identified through ELI, since once published in the State Official Gazette^[11], they become part of the domestic legal system, as established in the article 96 of the Spanish Constitution, becoming, therefore, "units of national legislation".

In the case of local regulations, the application will be carried out in the terms defined in section 11.3.a) of the specification.

4.2 4.2 Time frame

Although he benefits from ELI are greater the broader is the set of norms considered, it is required to focus t on that legislation most queried by citizens.

Since most of the legislation in force has been issued after the Constitution and the firsts Autonomy Statutes were approved in 1979, ELI will be applied, at least, to state and autonomic legislation published since 29/12/1978.

In the same way, as some important legislation prior to 1978 is still in force, at the state level ELI will also be applied to all legislation published before 29/12/1978 and having a consolidated version. To the extent that it is a minimum application temporary scope, both the State and the Autonomous Communities can widen it, according to their possibilities and needs.

The local entities, as stated by section 11.3b), can define the temporary scope of the rules to which ELI is applied based on their possibilities.

5. CONCEPTUAL MODEL

5.1 The concepts of the ELI ontology^[12]

The ELI ontology defines a core model for describing legal resources, aimed at supporting the link with other legal resources, along with their publication and reuse.

ELI itself builds on the well-established model for "Functional requirements for bibliographic records' (FRBRoo), aligned with other current standardization initiatives in the field. FRBRoo distinguishes between the concepts of "work" (distinct intellectual or artistic creation), "expression" (the intellectual or artistic realization of a work) and the "manifestation" (the physical embodiment of an expression).

In the specific case of ELI, the following concepts can be identified:

• Legal Resource (eli:LegalResource): concept of legislative resource (it can be a complete rule or part of a rule, for example an article^[13]). The legal resources can be described and related to each other using the properties of the ELI model.
• Legal Expression (eli:LegalExpression): are the concrete embodiments of a legal resource, typically in the form of a sequence of alphanumerical characters. Those that respond to the use of different languages and those that respond to different versions of the resource can be considered expressions of a legal resource. The legal expressions always must be linked to the legal resource they express (there is a mandatory property in the ELI ontology for this eli:realizes).
• Format (eli:format): is the physical embodiment of a legal expression, either on paper or electronically. Formats must be linked to the legal expressions they embody using the property eli:embodies.

The picture embedded below includes these three concepts, applying them to a specific resource, in this case the Council Conclusions inviting to the introduction of the ELI.

The organization of the information in multiple conceptual levels, following the FRBRoo structure allows users to:

• create links from a precise description level to another level (the original publication, a consolidated text, a specific translation…),
• take advantage of the information already integrated in each conceptual level, with no need of reiterating in the following ones.

5.2 What to consider a legal resource

ELI ontology accommodates different points of view of what should be considered a new legal resource, or a new legal expression of the same resource^[14].

This flexibility is particularly useful in a legislative context such as the Spanish one, which is structured in several territorial levels, each of them with its corresponding official gazette, in which certain rules are subject to double publication and in which the publication can be done in several languages.

Therefore, in the implementation of ELI in Spain, two levels of legal resources will be taken into consideration for each piece of legislation:

• a first level, which corresponds with the rule in an abstract way: for example the Law 37/2007, of November 16, about information reuse in the public sector.
• a second level of legal resources derived from the previous one, which corresponds to the different versions that a rule may have, whether it is the one published initially or the consolidated version.

Consequently, there must be configured always for each piece of legislation, at least, two legal resources (eli:LegalResource):

• The abstract legal resource.
• The initial legal resource, that is, considered as the concrete text initially published.

In addition, those public administrations that offer an updated text of the rule, should also configure a consolidated legal resource. In case the administration also offers the previous texts that the rule has presented, it will be necessary to configure each of these intermediate wordings as a different legal resource.

Along with this, those public administrations that have a corrected version^[15] of the rules, independently from the consolidated version, should treat this corrected version as a different legal resource.

All legal resources derived from the same rule are linked with two specific properties of the ELI ontology:

• eli:is_member_of^[16]
• eli:has_member^[17]

In turn, the initial legal resource and the consolidated legal resources are linked with the properties eli:consolidates (to link a consolidated legal resource with the initial legal resource that it consolidates) and eli:consolidated_by (to link an initial legal resource with the consolidated legal resource corresponding to its successive versions).

Each of the legal resources would have its corresponding expression or expressions, whether published in one language or in several^[18].

The legal resource and its expressions are linked through the properties of the ontology eli:realizes and its inverse eli:is_realized_by.

Finally, the expression and formats in which is offered are linked with the properties eli:embodies and eli:is_embodied_by.

The structure of legal resources and its links can be consulted in detail in the examples included in the URI cases of the technical information.

The State and the Autonomous Communities must configure always an abstract legal resource. The local entities can establish an easier conceptual model, in the event that they only offer one version of the rule (either the initial one or the consolidated one) in the terms described in section 11.4.

5.3 The case of double publication

As mentioned in point 2.2, some autonomic and state rules are published in two official gazette.

In these cases, even it is the same rule, each of the publications must be treated as an independent abstract legal resource. So there is an abstract legal resource for the first publication and other abstract legal resource for the second publication.

Thus, in the case of the most usual re-publication example, which is that of the autonomic acts^[19], once the publication is made in the autonomic official gazette, an abstract legal resource will be generated, with the metadata of the publication in the quoted official gazette. It will have associated the corresponding initial legal resource and successively, in its case, the consolidated legal resources as needed. Subsequently, once the autonomic law is published in the State Official Gazette (BOE), the State will have to create the abstract legal resource corresponding to said publication and the associated resources (initial and consolidated in its case).

The two abstract legal resources that are created, as well as their corresponding initial legal resources, will be linked through the properties of the ontology eli:is_another_publication_of and eli:has_another_publication.

An example of the double publication treatment can be consulted in the URI cases of the technical information.

5.4 The Internet domain

According to the conceptual model presented, it is not necessary to have a single ELI domain, but the State, each Autonomous Community and each of the legal entities may create their own "ELI domains".

In order to facilitate the reuse of "ELI information", it is recommended that the URI ELI is built in the following way:

• first the HTTPS access protocol to the resource followed by colon
• the domain, preceded by two slashes (//)
• the path, consisting of a sequence beginning with /eli and followed by the other components of the URI template, which are described in the next section of the specification.

For example:

• https://www.eur-lex.europa.eu/eli/
• https://www.lovdata.no/eli/
• https://www.boe.es/eli/
• https://www.borm.es/eli/

6. IDENTIFICACION OF THE RULES ACCORDING TO ELI SYSTEM

ELI uses "HTTP URIs" to specifically identify all online legal information officially published across Europe.

These URIs are formally described by machine-readable URI templates (IETF RFC 6570), using components that carry semantics both from a legal and an end-user point of view.

Each Member State will build its own, self-describing URIs using, whenever it is possible, the described components as well as taking into account their specific language requirements. These components are^[20]:

URI components

	Name eli	Comments
Jurisdiction	Jurisdiction	Use of DCTERMS. ISO3166: 2 alpha country codes, e.g. ‘LU’ For international organizations, the registered domain name can be used: e.g. ‘EU’ or ‘WTO’
	Agent	Administrative hierarchical structure, e.g. federal States, constitutional court, parliament, etc.
	Subagent	Administrative hierarchical substructure, e.g. the responsible ministry
Reference	Year	YYYY Various interpretations allowed depending on countries’ requirements, e.g. date of signature or date of publication, etc.
	Month	MM
	Day	DD
	Type	Nature of the act (law, decree, draft bill, etc.) Various interpretations depending on countries’ requirements
	Subtype	Subcategory of an act depending on countries’ requirements (e.g. corrigendum)
	Domain	Can be used if acts are classified by themes, e.g. codes
	Natural identifier	Reference or number to distinguish an act of same nature signed or published on the same day
Subdivision	Level 1	Reference to a subdivision of an act, e.g. Article 15
	Level 2	Reference to a smaller subdivision than level 1, e.g. Article 15.2
	Level 3	Reference to a smaller subdivision than level 2
	Level n	Reference to a smaller subdivision
Point in time	Point in time	YYYYMMDD Version of the act as valid at a given date
Version	Version	To distinguish between original act or consolidated version
Language	Language	Language codes (International Organization for Standardization (ISO 639).
Format	A file format, like «pdf» or «html»	Note that the Council conclusions inviting the introduction of the European Legislation does not list this component explicitly, but it is always part of the URIs to identify the eli: format level.

All the components are optional and can be selected based on national requirements and do not have a pre-defined order.

To enable the exchange of information, the chosen URI template must be documented using the URI template mechanism, as in the following example:

According to ELI ontology, each identifier must be split into at least three levels:

• One identifier for the legal resource.
• One or more identifiers for the legal expression or legal expressions.
• One or more identifiers for the format or formats of each expression

The countries are free to select and organize the components of the URI template in the most appropriate way to adapt their needs, however, they must take into account a series of recommendations:

• Create identifiers that are as close as possible to the way in which legislation is cited by users, using those components of the template that are usually used to cite legal resources. If the URIs are understandable not only for the machines but also for people, who can foresee what they will find when they click on them, access is facilitated.
• Ensure that each URI identifies a single legal resource. For this reason, it is recommended not to add elements that do not contribute to the univocal identification of the legal resources and to evaluate the options when there is legislation that is not numbered or the same number is attributed to more than one legal resource.
• Design stable URIs, which requires that elements that can change over the time are not included in the template. Once the URI is established, it shouldn't be erased and a redirection mechanism should be implemented.

Taking into account these recommendations and the specific legal and technical considerations of the Spanish regulatory system, the URI structure for state and autonomic rules will be the following:

URI Components

Name (ELI)	Description	Format	Values	Comments
Jurisdiction	Jurisdicción	Limited list of alphabetic values	List of controlled values	ISO 3166 alfa 2: ISO 3166-1 for the State ISO 3166-2 for the Autonomus Communities
Type	Tipo	Limited list of alphabetic values (1 to 4 letters)	List of controlled vocabulary	The types will be identified by acronyms with a variable length
Year	Año	Numeric values Format YYYY	2001, 2002…	Date of signature (yyyy/mm/dd)
Month	Mes	Numeric values Formast MM	01, 02…
Day	Día	Numeric values Formart DD	01, 02…
Number (natural identifier)	Número	Numeric and, occasionally, alphanumeric values		In general, the number is the official number of the legal resource
Version	Versión	Limited list of alphabetic values (3 letters)	List of controlled values	Identifies if the legal resource is the initial, the consolidated or the corrected one
Version_date (point in time)	It indicates the date of updating.	Numeric values: YYYYMMDD		For consolidated legal resources.
Language	Langua	Limited list of alphabetic values	List of controlled values	ISO 639-3 (3 letters code), with adjustments for Valencian and bilingual documents.
Format	Formato	Limited list of values	html, pdf, epub, xml	The format values must be comply with the typologies established by IANA

7.1 Jurisdiction (eli:jurisdiction)

Until now, most of the countries that have implemented ELI and the EU itself, have not incorporated the jurisdiction element in ELI, since this information already appears in the Internet domain.

However, given that both state and autonomic official gazettes can publish their own territorial level legislation and that from other territorial levels, the domain is not enough to identify if the considered legislation is state or autonomic.

As a consequence, it is necessary to use the element eli:jurisdiction in the URI template, so that the territorial scope to which the considered legal resource corresponds is reflected. The ISO3166 alpha 2 standard will be used for this purpose.

Code	Territorial Level
es	State
es-an	Autonomous Community of Andalucía
es-ar	Autonomous Community of Aragón
es-as	Autonomous Community of Principado de Asturias
es-cn	Autonomous Community of Canarias
es-cb	Autonomous Community of Cantabria
es-cl	Community of Castilla y León
es-cm	Autonomous Community of Castilla-La Mancha
es-ct	Autonomous Community of Cataluña
es-ex	Autonomous Community of Extremadura
es-ga	Autonomous Community of Galicia
es-ib	Autonomous Community of Illes Balears
es-ri	Autonomous Community of La Rioja
es-md	Community of Madrid
es-mc	Autonomous Community of Región de Murcia
es-nc	Community of Foral de Navarra
es-pv	Autonomous Community of País Vasco
es-vc	Comunitat Valenciana
es-ce	Ciudad Autónoma de Ceuta
es-ml	Ciudad Autónoma de Melilla

7.2 Resource type (eli:type_document)

In the ELI scheme, the element eli:type_document (legal rank) must be collected in a controlled vocabulary table, according to the peculiarities of the national systems.

Most of Member States have chosen to publish their table of types with acronyms of variable length, except France, that maintains the complete denomination.

In the Spanish case, a limited list of values will be used, including both the ranks of state and autonomic legislation^[22], identified by acronyms of variable length (1 to 4 letters).

Given the existing linguistic variants for the same category, the identification by acronyms has the advantage that the resource is always named in the same way.

The values for the controlled vocabulary table eli:type_document are as follows:

As the types used in the State and Autonomous Communities databases are equivalent, there should be no disagreement about the type that should be attributed to a resource published in two official gazettes or disseminated in different databases. However, it could happen that a rule does not fit in any of the typologies. For these cases, it is recommended to contrast the type attributed by the administration responsible for the first publication before generating the URI corresponding to the second publication.

In any case, there would be a residual type named "alia" and intended to collect those rules that do not exactly correspond to any of the specific types.

Regarding the corrections of errors, they will be considered a subtype^[23]: the URI of the corrections will be formed with the standard structure of the ELI, adding subsequently the eli:number, the element corrigendum and the date of publication (eli:date_publication) of the correction of errors in the official gazette with format AAAAMMDD.

• /eli/{jurisdiction}/{type}/{year}/{month}/{day}/{number}/{corrigendum}/{pubdate}/{dof}^[24]/{language}/{format}

For example:

• Real Decreto 20/2017, de 20 de enero, sobre los vehículos al final de su vida útil.

  eli/es/rd/2017/01/20/20/

• Corrección de errores del Real Decreto 20/2017, de 20 de enero, sobre los vehículos al final de su vida útil.

  eli/es/rd/2017/01/20/20/corrigendum/20170327/dof/

7.3 Date of the resource^[25] (eli:date_document)

The date considered to build the identifier for the state and autonomic legislation is always the date of the signature, not the date of publication.

The components are used independently {year} {month} {day}, which will allow, through truncation of the URI, the recovery of all the rules corresponding to the same year, month or day.

• Year (Signing year): AAAA format
• Month (Signing month): MM format
• Day (Signing day): DD format

7.4 Natural identifier number (eli:number)

This element reports the official number^[26] that identifies each provision within its type or within its legal typology. The inclusion of this element in the template is due to two reasons:

• The ELI pretends to be a way of identification of the resource as close as possible to the way in which the legislation is cited by the users.
• Since in the same day several rules of the same type can be issued, sometimes, the elements "type" and "date" are not enough to identify the legal resources univocally,

However, in Spain not all the rules have an official number:

• The rules with the rank of law and decree are all identified with a sequential number, followed by year of issuance (for example Law 7/2015, Decree 126/2014, Royal Decree-Law 13/2017). The number is attributed in independent series for each of the legislative types. The calculation restarts with each calendar year. In the case of the state rules, the numbering began to be applied in the year 1959.
• Orders do not have uniform numbering guidelines: the State and the majority of the Autonomous Communities have begun to number the orders at different times, after the year 2000. The system of number attribution is very similar but not identical in all cases. The key point is whether the number is unique or not, since all orders, regardless of the Department issuing them, correspond to a single legal type in the ELI template.
• The resolutions are not numbered by the State nor by the majority of the Autonomous Communities, although a few communities do so.
• Regarding the rest of the ranks, the praxis is very variable.

a) Managing of the element Year

The year of adoption is always included (Law 5/2010, Decree 320/2016, Order PRE/7/2017,…) in the official number of Spanish rules. Since this year is already part of the template through the element date_document, it has been decided not to include it as a part of the element eli:number in the URI template.

b) Management of the rules with unique official number

In the case of higher rank rules, the sequential number will be used as natural_identifier, which allows the creation of a unique URI for each legal resource.

ANDALUCÍA:

• LEY 9/2016, de 27 de diciembre, de Servicios Sociales de Andalucía.

  eli/es-an/l/2016/12/27/9/

ESTADO:

• REAL DECRETO-LEY 2/2017, de 27 de enero, por el que se adoptan medidas urgentes para paliar los daños causados por los últimos temporales.

  eli/es/rdl/2017/01/27/2/

It should be pointed out that in certain cases of lower rank rules, the official number is composed by an alphanumeric code, prefixing the number with three identifying letters of the responsible department. In these cases, the complete alphanumeric code is considered as the number. However, to simplify the URI, the slash that separates the alphabetic and numeric element will be erased and only lowercase letters will be used.

CASTILLA Y LEÓN:

• ORDEN EYH/ 671/2016, de 25 de julio, por la que se dictan las normas para la elaboración de los Presupuestos Generales de la Comunidad de Castilla y León para el año 2017.

  eli/es-cl/o/2016/07/25/eyh671/

CATALUÑA:

• ACUERDO GOV/16/2017, de 21 de febrero, por el que se aprueba la modificación de los Estatutos de la Autoridad del Transporte Metropolitano, Consorcio para la coordinación del sistema metropolitano de transporte público del área de Barcelona, y su texto refundido.

  eli/es-ct/ac/2017/02/21/gov16/

c) Management of the rules with duplicate official numbers

Sometimes, depending on the numeration system used by each public administration, it may happen that rules of the same rank issued on the same date, present identical numbers, which could mean that different legal resources have the same URI^[27].

When the URI for the same type of legal resource is generated, and it has the same date and the same number of another legal resource that already has an URI, a suffix will be added to the official number, beginning with the letter "b" and following with the rest if this necessary "c", "d", "e"… etc. For this purpose neither the letter "a" nor the letter "ñ" will be used.

NAVARRA:

• Orden Foral 8/2015, de 4 de febrero, del Consejero de Educación, por la que se aprueban las bases que van a regular el procedimiento de admisión del alumnado en centros públicos y privados concertados, para cursar enseñanzas de segundo ciclo de Educación Infantil y Educación Primaria en la Comunidad Foral de Navarra.

  eli/es-nc/of/2015/02/04/8/

• Orden Foral 8/2015, de 4 de febrero, de la Consejera de Salud, por la que se crea el Servicio de Medicina Interna del Complejo Hospitalario de Navarra^[28].

  eli/es-nc/of/2015/02/04/8(b)/

d) Management of the rules without an official number

In the case of rules without an official number, either because its legislative type that does not have an associated official number, or because it is an old regulation, a fictitious number^[29] will be assigned. This number will be included between brackets, in order to differentiate it from the official numbers.

• When there are several rules of the same type and with the same date (and therefore with potentially identical URIs), the fictitious number (1), (2), (3)… etc, will be assigned sequentially.
• When there is only one legal resource of the same type and with the same date, the sequential one (1) will be attributed, even when there is no risk of confusion with another legal resource, given that the natural identifier is a fixed component of the template.

ASTURIAS:

• Resolución de 30 de marzo de 2016, de la Consejería de Presidencia y Participación Ciudadana, por la que se aprueban las bases reguladoras de la concesión de ayudas a emigrantes retornados.
• eli/es-as/res/2016/03/30/(1)/

ESTADO

• Resolución de 24 de febrero de 2017, de Puertos del Estado, por la que se publica la de 14 de noviembre de 2016, sobre delegación de competencias.

  eli/es/res/2017/02/24/(1)/

• Resolución de 24 de febrero de 2017, de Puertos del Estado, por la que se publica la de 14 de noviembre de 2016, sobre delegación de competencias.

  eli/es/res/2017/02/24/(2)/

• Resolución de 24 de febrero de 2017, de Puertos del Estado, por la que se publica el Acuerdo del Comité de Distribución del Fondo de Compensación Interportuario, sobre delegación de competencias.

  eli/es/res/2017/02/24/(3)/

• Resolución de 24 de febrero de 2017, de la Secretaría General de Pesca, por la que se publica la actualización del censo de las flotas de altura, gran altura y buques palangreros mayores y menores de 100 toneladas de registro bruto, que operan dentro de los límites geográficos de la Comisión de Pesca del Atlántico Nordeste.

  eli/es/res/2017/02/24/(4)/

7.5 Version (eli:version)

This element identifies if the resource corresponds to the rule's initial text, as it was published in the official gazette, or if it is the consolidated legal resource.

The element eli:version must present a controlled vocabulary table associated, which in the case of Spain, includes the following values:

• dof, initial legal resource
• con, consolidated legal resource

Besides, it is available the value "cer" for those public administrations that have a corrected version. This value will be used only if the system offers the text of the rule including the corrections (so, it is not an initial legal resource) and offers it independently and apart from the consolidated versions (so, it can not be considered a consolidated legal resource)

7.6 Date of the version (eli:version_date)

This template component shows the point in time of the updating of consolidated legal resources^[30], based on the criteria used by each public administration to create consolidated versions (text in force, last published text…).

The format YYYYMMDD, recommended by the EU, will be used to distinguish it from the date of signature.

The element eli:version_date has to be part of the URI only when the intermediate consolidated versions are offered by the system^[31]. Nevertheless, if that is not the case, it could be useful to have this information in the system as a metadata.

By default, if there is not a point in time in the request of a consolidated legal resource, the system will show the last consolidated version because is considered more useful for the user.

7.7 Language (eli:language)

This component of the template identifies the different languages in which the legal resources are published.

To build up this element, the three letters code of ISO 639-3 will be used, with an adaptation for Valencian^[32] and for the bilingual texts, given that some public administrations publish two linguistic versions in the same document.

LANGUAGE	ISO 639-3
Spanish	spa
Catalan	cat
Basque	eus
Galician	glg
Occitan	oci
Valencian	vci
Multilingual texts	mul
Bilingual texts
Catalan+Spanish	cat-spa
Basque+Spanish	eus-spa
Galician+Spanish	glg-spa
Occitan+Spanish	oci-spa
Occitan+Catalan	oci-cat
Valencian+Spanish	vci-spa

It must be remarked that this table of authorities refers only to the languages with official value in Spain. In the case of a public administration offering legal resources in other foreign languages (English, French…) the corresponding values of ISO 639-3 will apply.

7.8 Format of the publication (eli:format)

The values of the URIs recommended by the EU are the ones established by the IANA. The full list can be consulted at: http://www.iana.org/assignments/media-types.

ELI admits different points of view regarding what can be considered as a legal resource. Thus, in addition to the rules, the ELI ontology provides the possibility of applying the identifier to the gazette itself, according to each Member State consideration.

Therefore, along with the URI template envisaged for the rules, it has been considered convenient to include in this technical specification a URI template model for the issues of the official gazette and the summaries (indexes).

For these purposes, two values of the controlled vocabulary table "type" will be used.

• day: to identify a copy of the official gazette^[34]
• sum: to identify the summary

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Nevertheless, the application of this template depends on each administration, as it is not strictly necessary in terms of interoperability.

9. MANAGEMENT OF ELI URIS

The web servers must be configured to resolve ELI URIs, managing the contents so that the information is displayed according to the representation that is most appropriate for the user. In practice, when searching through the URI of a legal resource, there will always be a redirection to the URI of an expression of that legal resource that is appropriate, after analysing the characteristics and preferences of the users.

When an HTTP request is made by a person or a program, the web server can reply in two ways:

• A page with the description of the legal resource (file that includes the link to the document)
• The legal resource itself (the document with the text of the legal resource)

If there is already a system to offer legal resources, it is not necessary to build a new one. The web server can use redirection techniques (HTTP 303) that respond with the URI of the system in production when receiving an ELI request.

URIs must be persistent over time. An improperly offered URI should not disappear and generate a broken link, instead of that, the server can redirect the correct URI or indicate the error (and, in this case, the correct URI).

The implementation of the URI template in Spain requires the standardization of the metadata used by the different public administrations to describe legislation, at least those containing the information of the components of the URI.

Therefore, in Spain Pillar 1 must be addressed together with Pillar 2, in order to establish a common minimum metadata set:

• The metadata containing the information to build the URIs of the ELI.
• The metadata defined as mandatory by ELI ontology.
• The metadata with basic information about the publication of the legal resource: date of publication and publishing entity.
• The metadata defining the relations among entities that build the conceptual model described in section 5.

This initial definition of common metadata will be expand as progress is made in the implementation of the identifier, with the gradual approach that characterizes the ELI. The goal is to approach the definition of the metadata schema and the incorporation of additional metadata that ease greater interoperability, as well as those that define the legal relations among rules.

However, the administrations do not have to replace their current metadata schemes. The ELI metadata can be used in combination with customized metadata schemes and the mapping of the elements used in their own scheme with those of the ELI ontology can be done.

The set of minimum common metadata is as follows:

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11. ADDENDUM FOR THE APPLICATION OF ELI TO LOCAL LEGISLATION

11.1 Legal and technical requirements for the implementation

The technical specification has designed a flexible implementation system, adapted to the variety and diversity which characterizes the Spanish legislation in its different territorial levels.

Nevertheless, regarding local legislation, some specific legal and technical requirement should be taken into account, which imply the need of adapting the adopted solutions for the state and autonomic rules:

a) Technological situation of the official gazettes of the provinces and their information systems

The rules of local entities should be published in the corresponding official gazzete of the Province (Boletín Oficial de la Provincia / BOP), and this publication defines its entry into force

There are 43 official gazettes of the province, since in the case Autonomous Communities formed by a single province, the publication of local rules takes place in a specific section dedicated in the autonomic official gazettes^[36].

All the official gazettes are published in electronic edition. Some of them offer besides the pdf format, the html or xml format also.

So far, the official gazettes of the Province have been focused mainly on offering a service of official and authentic publication, with the access to published issues of the gazette through calendars systems. This technique is usually completed with simple search engines, based on different searching criteria such as text, date and sometimes subject words. However, it is common that search engines only retrieve information from a recent date o, in most cases related to the moment in which these gazettes became electronic publications.

Most gazettes lack of structured metadata which describe the published contents. Thus, it is normal that rules are not distinguished (the "legislation", the object of the ELI project) from other types of contents of their information systems. Besides, very few official gazettes of the province label the documents with the identification of the local entity that issues the legislation.

Additionally, many official gazettes are only published as a pdf document, with no other specific pdf or html page for each published provision or announcement. Consequently, rules have not a singular entity in the information systems of these official gazettes of the province. And it makes it incompatible with the model of ELI, which is based on the individualization of each resource that needs to be identified uniquely.

In this technological context, the implementation of ELI by most official gazettes of the province should be tackled in a more ambitious documentation and technological updating project of the publication and database systems.

The technological situation is different in the case of Autonomous Communities formed by a single province, whose gazettes have more evolved systems. They have already applied or are in the process of applying ELI to autonomic legislation.

Regarding the additional rendering of legal services -such as the legal analysis of published rules or the development of consolidated texts- these activities are carried out by the local entity more than by the corresponding official gazette, because of the high legal specialization they involve.

In any case, thanks to ELI there will be a greater interoperability which will allow that the consolidated texts offered by the local entities will be linked from the official gazette of the province. It will give an easier access to law for the citizens.

b) Heterogeneity of local legal information systems

Local entities, at least the local councils of greater size and all the provincial councils, offer legal information in their websites. Also, in some specific cases, the provincial council provides information about the current regulation of the entities within its scope. The information is often hosted in the respective transparency website.

In practice, these online information services of local entities seem to be the main source of legal information for citizens and for legal practitioners, instead of the territorial official gazettes.

In any case, the heterogeneity of local entities and the changeable situation in their technological projects determine that their legislative information systems are different, when they are available:

• Most of them offer a simple list of rules (usually Ordenanzas y Reglamentos only) which give access to the initial published version of the text.
• Some systems have search engines which are organized according to different criteria, such as text, type of rule or subject words.
• Sometimes, the text of the rule is completed with information about its legal status and its subsequent amendments.
• The more evolved systems offer the consolidated text of the municipal legislation.
• In a few cases, legal information is offered in structured formats specifically aimed to its reuse.

As the official gazettes of the province, the different range of maturities in these local information systems constrain the possibilities of applying ELI. However, since the amount of rules in local information systems is limited, the implementation of the identifier is easier for them than in the official gazettes of the provinces, which publish a larger number of rules every year.

It has to be added that some local entities have an informative gazette^[37]. In relation to legislation, that is the scope of ELI project, legislation is published in these informative gazette only for informative purposes , so they are quite similar to the legal information services that local entities offer to the citizens.

Finally, it should be remarked that in general terms, there are not significant relations between the official gazettes of the province and local information systems.

11.2 Purpose and scope of the local legislation Addendum

The aim of this Addendum is to adapt the guidelines of implementation to the characteristics of the local legislation, so the interoperability of legal information offered online by the different Spanish public administrations is guaranteed.

In this sense, the variable technological situation of the official gazettes of the province and the legal information systems of local entities do not allow to draw up a uniform goal for implementing ELI to local legislation. For this reason, as opposed to what is planned for state and autonomic legislation, the Addendum sets out a model of asymmetric implementation, in which each official gazette of the province and each local administration can apply the identifier at its own pace and with the intensity allowed by its resources. It is true that most benefits of the ELI are obtained when the three pillars are implemented, but it is also possible to improve significantly the interoperability through a gradual approach.

With these goals, this Addendum:

• defines the URI template for local legislation and its components (pillar 1) with an equivalent structure to the state and autonomic legislation.
• lays down a set of minimum common metadata, in line with the ones planned for the state and autonomic legislation (pillar 2).

Some provincial and local entities gazettes have well developed legal information systems, so they are able to apply the European standard easily and to take advantage of the possibilities available in terms of interoperability, transparency and new services development. However, for other local administrations, ELI implementation is not possible at the moment, because they should improve simultaneously in their information systems.

Nevertheless a defined and steady specification have advantages for those entities also:

• it will allow to plan future developments so that the fulfilment of the European standard and the interoperability with other Spanish and European administration systems is guaranteed.
• it will make easier the progress of their systems, since it offers a standardized format "ready to use" to identify, describe and structure legal information.
• the existence of a common framework will allow them to benefit from the experience acquired by the rest of the entities that have implemented the identifier.

All in all, the Addendum of the specification is an instrument for local administrations to apply ELI, at its own pace.

Despite this, in order to improve interoperability, the application of ELI has to be done in a coordinated way with the implementation developed not only by the State and the Autonomous Communities, but also by the rest of local entities. The goal of this coordination is not synchronizing the application of ELI by the official gazettes of the province and by the different local entities of their scope, but to avoid incompatibilities between the properties attributed to the same legal resource, which in the end will make interoperability impossible.

In fact, a) the heterogeneity of local rules, b) the fact that information systems in which these rules are offered depend on different public administrations -the official gazette of the province and the local entity issuing the rule-, and c) the asymmetry of the model of implementation, make necessary an additional effort of coordination. One of the principles around which ELI is built is that every resource has its corresponding unique identifier and the metadata values that define its legal properties are the same, no matter the information system which is offering them.

Therefore, the coordination requires that when a local entity is going to apply ELI, it should analyse before if the official gazette of the province which publishes its legislation is also applying it and in which way. And vice versa, if local entities have begun to implement ELI before the official gazette of the province, the latter should study how the application by the local entities of its territorial scope is being developed.

To this effect, the publication of updated and complete information about the way each local administration applies ELI (either an official gazette of the province, a provincial government or a local government) constitutes a mus,t so that coordination in the implementation of the project and, therefore, interoperability of legal information can be assured.

Besides, the Council conclusions of November 2017 on the European Legislation Identifier establish that all administrations that apply the identifier or have planned its application, must have a website with all the information about the project.

As it has been pointed out above, the webpage https://www.elidata.es/, apart from informing about the ELI project to the citizenship, offers technical resources for the application of the identifier and gathers updated information about the implementations carried out by the State and the Autonomous Communities, through the link to their respective ELI webpages.

In order to ensure coordination in the local scope, it is necessary that those local entities that apply or plan to apply ELI, inform the webpage elidata.es about their corresponding webpages, as the State and the Autonomous Communities have been doing until now.

In this way, the common website elidata.es will facilitate that the official gazettes of the province and the local entities within their scope can find the required information so that their respective implementations are compatible^[38]. Likewise, the availability of this information will allow that any public administration takes advantage of previous implementation experiences already developed by others, anticipating risks and avoiding mistakes, with the consequent time and resources savings.

11.3 Scope of application of the Addendum for local legislation

a) Legislative scope

ELI is applied to "legal resources", that is, to legislation and not to administrative acts.

Thus, in the local scope, ELI will apply only to those documents with these two conditions:

• having regulatory nature and subsequently,
• its entry into force requires the publication in the corresponding official gazette of the province (independently of being the official gazette of the province or the local entity the one who offers the resource identified with ELI).

Local legislation presents a rich typology: apart from the Ordenanzas and the Reglamentos as the most representative categories, other decisions of local entities could also have regulatory nature, such as town planning or instrumental entities' statutes.

Despite the fact that ELI benefits are greater the larger the set of rules applying ELI is, according to the gradual character of the identifier it is not necessary to extend it to all local rules, at least at the beginning. Each entity can decide to which categories applies ELI: either only to Ordenanzas, or to both Ordenanzas and Reglamentos, or if it is expanded to other regulatory categories that are eventually arranged.

For instance, even if the implementation is only limited to Ordenanzas, it would suppose an important progress in terms of accessibility to local legal information, since Ordenanzas is the type of rule more significant to citizens and companies.

In any case, it is essential that each local administration informs about the specific types of rules to which the identifier is applied through its webpage with information about the ELI project.

Additionally, it should be remarked that the issuing procedure of local rules, in particular Ordenanzas and Reglamentos, includes the publication of a text provisionally approved and afterwards another publication for the final text. For the purpose of ELI application, only the final texts will be considered.

b) Time frame

Regarding the time frame of the legislation to which ELI is assigned, it is possible to apply a gradualness aproach likwise.

The ideal objective would be to apply the identifier with a time criterion equivalent to the one used for state and autonomic legislation^[39], and implement it for all the local legislation published after 29th December 1978. At the other side, the minimum objective would be to apply the identifier to the new resources that are being published after a fixed date.

Between one and another possibilities, all types of intermediate solutions could fit. Thus, regarding retrospective application, less ambitious options can be valid, such as the effective date of the Constitution of 1978. For instance, in the case of the official gazette of the province, other possibilities could be taken into account, such as the start date of the official electronic publication, which is when the available information is likely to be easier to structure.

It is equally feasible that this temporal approach combines with criteria related to normative scope: for example, a local entity could apply ELI to all Ordenanzas passed since 1978 (or only to Ordenanzas that are currently in force) and for the rest of the rules, apply ELI only to those published in the future.

Any of these options of implementation could be valid. It should be outlined again that it is important that each local administration publish and keep updated the information about the time frame to be considered in its corresponding webpage with information about the ELI project.

11.4 Conceptual model for local regulation^[40]

The model defined in section 5.2 is based on the existence of two levels of legal resources: the first level corresponds to the rule considered in an abstract way (abstract legal resource) and the second level is derived from the previous one and corresponds with the different versions that a rule can have, being either the initially published one or the consolidated (updated) versions^[41].

However, in the local scope, the outlook is more diverse:

• The official gazettes of the province only offer the initial version of the rule as it was published and probably they are not going to offer in the future a wider portfolio of services with consolidated texts.
• The information systems of local entities present different solutions: most of them offer the initial version of the rule; other systems only give access to the consolidated text; and the most comprehensive ones have the initial and the consolidated text.

Those local entities that offer both the initial and the consolidated versions or that have planned to offer them, should implement necessarily the model of section 5.2, configuring a legal abstract resource so that the initial and the consolidated versions of the rule are grouped around it by using the ELI properties "eli:is_member_of"^[42] and "eli:has_member"^[43].

Consequently, if the legal information system has the initial and consolidated version, at least three legal resources should be configured for each one (eli:LegalResource):

• An abstract legal resource
• An initial legal resource, that is to say, considered with the initially published specific content
• A consolidated legal resource. In case that the entity offers the last consolidated text together with the intermediate wordings of the rule, it will be necessary to configure each of these versions as a different consolidated legal resource.

Equally, the initial and the consolidated legal resources are related to each other with the properties eli:consolidates (in order to relate the consolidated legal resource with the initial resource it consolidates) and eli:consolidated_by (in order to relate the initial legal resources with the consolidated legal resources that corresponds to its consecutive updates).

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Those local entities offering a unique version of the rule (either the initial or the consolidated one) can configure a single legal resource:

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Anyway, independently of the fact that the model used by the entity has a legal resource or not, the initial and/or consolidated legal resource should have at least a legal expression (if it is published only in one language) or those that are appropriate in case of being published in different languages^[44].

The resources is related to its expressions by means of the properties of the ontology eli:realizes and its opposite eli:is_realized_by.

Each expression has to be shown in one or several formats (pdf, html, xml…). The expression and the different formats in which the resource is offered are related by means of the properties eli:embodies and eli:is_embodied_by.

The specification focuses on the cases with double publication in the state and the autonomic gazettes^[45]. This double publication model could also be applied when there is a local informative gazettel, with the purpose of relating such publication with that of the Official Gazette of the Province. However, doing it this way, it would be necessary to be specially cautious with regard to eli:date_publication metadata.

As it is shown in the next section, in the case of local rules, this element is part of the URI and it should correspond always to the date of publication in the official gazette of the province in order to avoid the creation of different URIs for the same resource. Thus, the date of publication in the local informative gazette should be handled as metadata of the local information system itself and not as the eli:date_publication metadata.

11.5 URI template for local legislation^[46]

The structure and the components of the local rules URI are the same as the ones for state and autonomic legislation.

Nevertheless, two special features should be taken into account:

• the date of the rule to be considered for the elements {year}, {month} y {day} is not the date of the signature of the provision, but the publication date^[47].
• the elements {jurisdiction} and {type} are formed based on the specific tables for local legislation

URI Components

ELI name	Description	Format	Values	Comments
Jurisdiction	Jurisdicción	Limited list of alphabetic values	List of controlled vocabulary	ISO 3166 alfa 2+ registration number in the Registry of local entities
Type	Tipo de norma	Limited list of alphabetic values (1 to 4 letters)	List of controlled vocabulary	The types will be identified by acronyms with a variable length
Year	Año	Numeric values Format AAAA	2001, 2002…	Date of publication in the BOP (yyyy/mm/dd)
Month	Mes	Numeric values Format MM	01, 02…
Day	Día	Numeric values Format DD	01, 02…
Number (natural identifier)	Número	Numeric and, occasionally, alphanumeric values		The number to be used is a fictitious identifier, unless the entities give an official number to the legal resource and it appears in the BOP
Version	Versión	Limited list of alphabetic values (3 letters)	List of controlled vocabulary	It identifies if the legal resource is the initial, the consolidated or the corrected one
Version_date (point in time)	It indicates the date of updating.	Numeric values. Format: AAAAMMDD		For consolidated legal resources
Language	Language	Limited list of alphabetic values	List of controlled vocabulary	ISO 639-3 (3 letters code), with adjustments for Valencian and bilingual documents.
Format	Format of publication	Limited list of values	html, pdf, epub, xml…	The format values must be comply with the typologies established by IANA

a) Jurisdiction (eli:jurisdiction)

This element identifies the territorial level of the considered legal resource. In the case of state and autonomic legislation, the ISO3166 alfa2 standard is used.

Regarding local entities, the ISO3166 alfa2 only has a classification for the provinces, so it is not useful to define the jurisdiction of all local entity in accordance with uniform guidelines.

Therefore, the system for all kinds of local entities, including the provinces, combines the ISO3166 alfa2 standard and the registration number in the "Registry of Local Entities".

The registration number in the above mentioned Registry is unique and constant in time and is freely accessible in the electronic site of the Department responsible for Public Administrations^[48].

The registration number has the structure "01XXYYYY", in which:

• 01 =>Type of entity
• XX => INE provincial coding
• YYYY => numeric code

For example,

The controlled vocabulary tables, combined with the ISO3166 alfa 2 rule and the registration number, are available and updated in the common website https://www.elidata.es/mdr/authority/jurisdiction/2/.

b) Type of resource (eli:type_document)

In the ELI schema, the element eli:type_document should be collected in a list of controlled vocabulary.

Just as for state and autonomic legislation, a limited list of values identified by means of acronyms of variable length (1 to 4 letters) will be used.

A simplified table has been preferred, focused on the more relevant regulatory categories, leaving only eventually the residual type named Otros ("alia") for regulatory nature decisions, such as bandos or those not corresponding to any of the types of the controlled vocabulary table.

Anyway, the table should not be interpreted in the sense that all categories must be included in the implementation. Each entity can decide to which types of rules applies the identifier, according to section 11.3.

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Local entities should use exclusively the table of controlled vocabulary of the local legislation types. Under no circumstances should they use the specific "type" of the state and autonomic legislation^[49]. There are only two common categories in both tables of controlled vocabulary, "reglamento" and "otros", which are the only ones that can appear under state, autonomic and local jurisdiction.

It should be noted that these are the types of legal resources for ELI, but each entity can maintain in its own system or database a richer and more complete typology, and make the corresponding mapping with the eli:type table.

With the purpose of assuring interoperability, the assignment of the type_document should be carried out according to the legal nature of the rule and not to the variable methods in which the provincial official gazette has been published. In this sense, the same type of legal resource, for example a bylaw, can appear published in different ways, such as:

• Ordenanza
• Aprobación de la ordenanza
• Acuerdo del Pleno por el que se aprueba la ordenanza/por el que se eleva a definitiva la ordenanza
• Edicto (de aprobación) de la ordenanza
• Anuncio (de aprobación) de la ordenanza

All these cases fit in the same eli:type_document: "ordenanza", in spite of the fact that each provincial official gazette can continue the publication in the same way as the present ones.

Nevertheless, it could happen that a rule could be difficult to fit in any of the typologies. For these cases in order to avoid the creation of incompatible URIs, it is recommended to contrast the type attributed by the administration that has implemented the ELI in the first place (either the BOP or the local entity) before creating the corresponding URI.

Some examples of allocation of types:

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With regard to the correction of errors, they will be considered a subtype, in the same terms as it has been stated for state and autonomic legislation.

The URI of the corrections will be formed with the structure of the URI of the abstract legal resource corresponding to the corrected rule, adding after the eli:number, the element corrigendum and the date of publication (eli:date_publication) of the correction of errors in the provincial official gazette, with format AAAAMMDD, in order to distinguish it from date of publication of the rule which has been corrected.

/eli/{jurisdiction}/{type}/{year}/{month}/{day}/{number}/{corrigendum}/{date_publication}/{dof}/language/format

For example:

The correction of errors only occur regarding the initial version of the legal resources. The consolidated resources cannot have the subtype of correction of errors.

c) Date of the resource (eli:date_publication)

One of the particularities of the URI template for the ELI for local legislation is that the date to be considered for the URI formation is the date of official publication of the text (the final text) in the official gazette of the province^[50] and not the adoption or signature date^[51].

The reason for this difference is that the adoption date is subject to legal interpretation, since the final text of some types of local rules is implicitly approved. In case the adoption date is used, it could easily lead to the attribution of incompatible URIs for the same legal resource.

The components are used independently {year} {month} {day}, and it will allow, through truncation of the URI, the recovery of all the rules of the same "type" published the same year, month or day.

• Year (publication year) AAAA format
• Month (publication month) MM format
• Day (publication day) DD format

d) Natural identifier number (eli:number)

This element informs about the official number that identifies each provision within its normative type.

The introduction of this element in the template is essential, since occasionally, the elements "type" and "date_publication" are not enough to identify the legal resources univocally. Different rules of the same type and adopted by the same entity can be published on the same day.

Almost all the local rules do not have an official number that is the number which is mentioned in the title of the publication in the official gazette of the province, with an identifying purpose and responding to formalised, normalised and consistent attribution criteria.

In this sense, those numberings that some provincial gazette assign to the provisions at the moment of their publication and only for the gazette organization purposes and internal control (as the publication order number, the marginals , the electronic verification code (CVE) and others) are not considered official numbers.

The official numbering range of the local rules is complicated since, sometimes, the information systems of the local entities present numberings (for instance, of taxing Ordenanzas) that are not included in the title published in the official gazettes of the province.

The lack of evenness in the numbering of the same rule can cause a great volume of inconsistencies in the URIs, so, as it has been pointed out, only the numbering appearing in the title of the publication in the official gazette of the province can be considered as eli:number. If the local entity has its own numbering which is not mentioned in the publication of the BOP, it can be included in the eli:id_local metadata, but it will never be used as eli:number neither for the creation of the URIs nor for the creation of ELI metadata.

When the rule has an official number, the criteria established in section 7.4 of the specification are the ones to follow for the attribution of the eli:number.

In case there is not official number^[52], which the situation that will happen in most cases, the URIs of the ELI should have always the element eli:number. Therefore, in these cases, a fictitious number will be generated.

This fictitious number will be included between brackets in order to differentiate it from the official numbers.

• When there are several rules of the same local entity and of the same type which have been published on the same date (and therefore with potentially identical URIs), the fictitious number (1), (2), (3)…etc., will be attributed sequentially.
• When there is a unique legal resource of the same type and with the same date, the sequential one (1) will be always attributed, even when there is no a risk of confusion with another legal resource, since the "number" is a fixed component of the template^[53].

The allocation of fictitious identifiers in case of having different rules of the same type published on the same day turns out difficult, due to the asymmetry in the application of ELI by the different public administrations which can offer the same legal resource (official gazette and local entity issuing the provision).

Thus, in case that different rules of the same local entity are published in the official gazette of the province on the same day, the attribution of the fictitious number will be normally done by the official gazette of the province and the information system of the local entity independently. Moreover, it is likely that this set will not be simultaneous but in different moments.

As it has been mentioned before, the ELI model and the proper philosophy of any URI (Uniform Resource Identifier) requires the same URI for each piece of legislation, independently of the information system which offers it.

With the purpose of facilitating the coordination and avoiding the creation of incompatible URIs, the attribution criterion of the fictitious number could be the order of appearance of the rules in the official gazette. So, the rule which is published in the first place (which is "before" in the official gazette of the province index) would have the fictitious number (1) and so on.

In these cases of different rules issued by the same entity, which are of the same type and published on the same date, it is recommended that the administration which applys the ELI in the second place verifies the fictitious number attributed by the administration which created the URI first..

It should also be mentioned that on the occasion of the ELI project, the local entities could assess the interest of setting an official number to the rules, at least to the more relevant typologies. This attribution could be made similarly to how the higher rank normative types are numbered in the State and the Autonomous Communities: sequential number/year (either in a unique serie for all normative typologies or in independent series according to the type).

e) Version (eli:version)

This element identifies if the resource corresponds to the rule's initial text, as it was published in the official gazette, or if it is the consolidated legal resource.

The element eli:version must present a controlled vocabulary table associated, which in the case of Spain, includes the following values:

• dof: initial legal resource
• con: consolidated legal resource

Besides, it is available the value "cer" for those public administrations that have a corrected version. This value will be used only if the system offers the text of the rule including the corrections (so, it is not an initial legal resource) and offers it independently and apart from the consolidated versions (so, it can not be considered a consolidated legal resource).

f) Date of version (eli:version_date)

This template component shows the point in time of the updating of consolidated legal resources^[54], based on the criteria used by each public administration to create consolidated versions (text in force, last published text…).

The format YYYYMMDD, recommended by the EU, will be used to distinguish it from the date of signature.

The element eli:version_date has to be part of the URI only when the intermediate consolidated versions are offered by the system^[55]. Nevertheless, if that is not the case, it could be useful to have this information in the system as a metadata.

By default, if there is not a point in time in the request of a consolidated legal resource, the system will show the last consolidated version because is considered more useful for the user..

g) Language (eli:language)

This component of the template identifies the different languages in which the considered legal resource is published.

To form this element, as it has been planned for state and autonomic legislatoin, the three letter codes of ISO 639-3 will be used, with an adaptation for Valencian and for bilingual texts, since some administrations publish two linguistic expressions in the same document.

Language	639-3
Spanish	spa
Catalan	cat
Basque	eus
Galician	glg
Occitan	oci
Valencian	vci
Multilingual texts	mul
Bilingual texts
Catalan+Spanish	cat-spa
Basque+ Spanish	eus-spa
Galician+ Spanish	glg-spa
Occitan+ Spanish	oci-spa
Occitan+Catalan	oci-cat
Valencian+ Spanish	vci-spa

It should be noted that this table authorities refers only to the languages with official value in Spain. In case that an administration offers legal resources in other foreign languages (English, French…) the corresponding values of the ISO 639-3 will be applied.

h) Format of publication (eli:format)

The values of the URI recommended by the EU are the ones established by IANA. The complete list can be consulted in: http://www.iana.org/assignments/media-types.

i) Examples of URI

Some examples of URIs are as follows.

Ordenanza municipal reguladora del servicio de estacionamiento limitado en superficie del Ayuntamiento de Vitoria (publicada en el "Boletín Oficial del Territorio Histórico de Álava" de 28 de agosto de 2009)

Abstract legal resource:

• eli/es-pv-01010590/odnz/2009/08/28/(1)

Initial legal resource:

• eli/es-pv-01010590/odnz/2009/08/28/(1)/dof

Initital legal resource expressions:

• eli/es-pv-01010590/odnz/2009/08/28/(1)/dof/spa
• eli/es-pv-01010590/odnz/2009/08/28/(1)/dof/eus

Consolidated legal resource:

• eli/es-pv-01010590/odnz/2009/08/28/(1)/con

Consolidated legal resource expressions:

• eli/es-pv-01010590/odnz/2009/08/28/(1)/dof/spa
• eli/es-pv-01010590/odnz/2009/08/28/(1)/dof/eus

11.6 URI template for the provincial official gazettes

ELI admits different points of view with regard to what can be considered a legal resource. So, apart from the rules, it is possible to apply the identifier to the issues of the official gazette.

The core of ELI are the rules, since identifying and describing them in the same way is the condition for the interoperability and the improvement of access to legal information for citizens.

However, even if the aim of the project is not to assign an URI to the official gazettes of the provinces, it has been considered useful to include in this Addendum a model of URI template specific for the issues of the provincial gazettes and for the summaries or indexes, so that those gazettes with a technological situation not adequate for the application of ELI, could take part in the project by the application of the identifier to the official gazette itself^[56].

The URI-ELI template for the provincial official gazettes is the same planned for state and autonomic official gazettes.

For these purposes, two values of the controlled vocabulary table "type" will be used:

• dia: to identify a copy of the official gazette
• sum: to identify the summary

(Content not available in English)

For example:

• "Boletín Oficial de la Provincia de Cádiz" number 208 of 30 October 2020

  eli/es-an-02110000/dia/2020/10/30/208/spa

• Summary of the "Boletín Oficial de la Provincia de Cádiz" number 208 of 30 October 2020

  eli/es-an-02110000/sum/2020/10/30/208/spa

11.7 Common metadata for local legislation

The introduction of the URI template in Spain requires the standardization of the metadata used by the different administrations to describe legislation, at least those containing the information of the URI components.

Therefore, Pillar 1 should tackled together with Pillar 2, in order to establish a list of minimum common set of metadata to be shared with the rest of local entities and with the state and autonomic administrations.

The set of common metadata for local normative includes the following ones:

• The metadata having the information to form the URIs of the ELI.
• The metadata eli:title^[57].
• The metadata of date of the document (eli:date_document) and publishing entity (eli:publisher).
• The metadata of the resources with their expressions and formats: eli:realizes and eli:is realized_by, eli:embodies and eli:is_embodied_by.
• The metadata which define the relations between the resources make the conceptual model chosen by the local entity, in the terms described in section 11.4.

However, the administrations do not need to replace their current metadata model. The ELI metadata can be used combined with customized metadata models and the mapping of the elements used in their own model with those of the ELI ontology can be done.

Even if the list of common metadata is parallel to the state and autonomic legislation, some peculiarities about their dynamics when they are applied to local rules should be added:

1. The metadata eli:date_publication, as is has been mentioned before, corresponds to the date of official publication made, precisely, in the official gazette of the province or the official gazette of those Autonomous Communities formed by a single province.
2. The metadata eli:date_document (date of adoption or signature) is exclusively related to final texts, being either the date of approval/making public by the governing body or the date of signature by the competent authority, depending on the legal type it is being dealt with^[58].
3. The metadata eli:version_date is only needed if historic versions of consolidated texts are offered.
4. The metadata eli:is member_ and eli:has_member are necessary depending on the conceptual model of the entity, according to what is exposed in section 11.4. However, the metadata which relates the resources with their expressions and formats are mandatory: eli:realizes and eli:is realized_by, eli:embodies and eli:is_embodied_by.
5. The metadata eli:consolidates and eli:consolidated_by are only necessary if the entity offers consolidated texts.
6. The metadata eli:has another_publication and eli:is_another_publication will only be used in case there is a municipal informative official gazette and the purpose is to relate the publication of the official gazette of the province with that of the municipal informative gazette. It should be noted that these metadata are not applicable to the consolidated resources.

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Notas:

1. ^ Council conclusions of 6 November 2017 on the European Legislation Identifier.
2. ^ In the case of Catalonia, according to the Autonomic Law 35/2010, of 1 October, on Occitan, Aranes in Aran, all the laws of the Parliament must be published also in Aranes, as well as all the provisions, resolutions and agreements of the institutions and entities forming the Generalidad and its institutional system, if they specifically affect Aran.
3. ^ Royal Decree 489/1997, of 14 April, on the publication of laws in the co-official languages of the Autonomous Communities
4. ^ Apart from the laws, there are other unique cases of double publication in autonomic laws: just to mention some examples, decrees approving University Statutes in which the power is held by the Autonomous Community or traffic limitation resolutions in those Autonomous Communities with competence in this matter. Another cases to be added are the decrees for the calling of autonomic elections, which are simultaneously published in the autonomic official gazette and in the Official Gazette.
5. ^ The publication occurs simultaneously, and if not possible, it happens first in the Official Gazette, since this publication determines its entry into force.
6. ^ A consolidated text is a document that consists in the original text of a regulation and its modifications and corrections from the beginning. In Spain, these texts have no official value. Sometimes, consolidated legal databases offer only the last version of the consolidated texts, and in other cases, the intermediary versions are also offered.
7. ^ Thus, some countries have applied ELI to the most recent legislation, others have only implemented it for the regulations with an official number, and in other cases it has been established exclusively for legislation with higher category.
8. ^ European legislation is available in the European Union webpage http://eur-lex.europa.eu/homepage.html?locale=es. Nevertheless, EU legislation is also gathered in some national databases, which can take advantage from to have an easier access to them.
9. ^ The European Case Law Identifier (ECLI), applicable on an optional basis, establishes a European system for the identification of case law. ELI identifies legislative texts with different and more complex characteristics, but both systems are complementary. The Council promoted the creation of a European case law identifier and the definition of a minimum set of uniform case law metadata through the Council Conclusions on the European Case Law Identifier (ECLI) and a minimum set of uniform metadata for case law 2019/C 360/01
10. ^ The application of the identifier is respectful with the legal criteria that each administration applies to decide which provisions are included in their legislative databases.
11. ^ Articles 23 and 41 of Law 25/2014, of 27 November, of Treaties and other International Agreements.
12. ^ The ELI ontology has several versions, available at the Publications Office of the EU website https://op.europa.eu/en/web/eu-vocabularies/model/-/resource/dataset/eli. The technical specification is based on the version 1.1. It should be noted that all ELI versions are "retrocompatible"
    The most recent version up to now, 1.3, focuses on making it possible for ELI to work with a parallel ontology for the draft legislation, for those Member States that decide to adopt it.
13. ^ However, ELI could apply to a broader range of legal resources, for instance to the official gazettes in which regulations and collections of rules are published.
14. ^ According to the ontology "ElI ontology accommodates different points of view of what should be considered a new legal resource, or a new legal expression of the same resource. Typically, a consolidated version can be viewed, in the context of ELI, either as a separate legal resource (linked to original versions and previous consolidated version using corresponding ELI relations) or as a different legal expression of the same legal resource".
15. ^ The "corrected version" includes the corrections of the rule in the initial published text.
16. ^ Definition of eli:is_member_of: "it indicates that this resource is conceptually included in another one. Typically the successive temporal versions of a given legislation are conceptually members of a single 'abstract' resource. For the notion of physical inclusion, use eli:is_part_of".
17. ^ Definition of eli:has_member_of: "it indicates that this resource conceptually includes another one. For the notion of physical inclusion, use eli:has_part".
18. ^ If there is a bilingual document, there must be a unique legal expression.
19. ^ In case that the double publication is made in the Official Gazette of the Province and in the local informative gazette, see section 11.4.
20. ^ Council conclusions of 26 October 2012 (2012/C 325/02).
21. ^ With regard to the URI template for local legislation see also section 11.5.
22. ^ The ranks of each legislative system and those of the rest of the systems which are gathered in their respective databases have been taken into consideration.
23. ^ This solution was adopted by the Publications Office of the UE.
24. ^ A priori, the element corrigendum will only exist in the dof version.
25. ^ Even if rules are usually cited first by number and then by date, the date in the first place has been preferred, in view of the volume of rules with no numbering. In addition, this solution makes easier the retrieval of the different resources issued each year.
26. ^ It is recommended not to consider as official number those numberings which, even if they appear in the publication at the official gazettes, do not correspond with standardized and consistent attribution criteria and are attributed in an autonomous way by the managing center from which the provision comes.
27. ^ It has to be pointed out that the publication of two rules with duplicate number may not be simultaneous, so, when the URI is attributed to the first one, it is possible that the existence of another rule of the same date and with identical official number is not known.
28. ^ The real date has been changed in these orders for this example.
29. ^ The assignment of "fictitious" numbers is the usual standard followed by the Member States with regard to non-numbered rules.
30. ^ Those public administrations that have a corrected version (cer) can use this template component also.
31. ^ Otherwise the persistency of the URis could not be guaranteed.
32. ^ It has been preferred to identify Valencian with the acronym "vci", as it is stated in the Academy of Valencian Culture, as the acronym "val" is reserved, according to ISO 639, for the language "vehes".
33. ^ Regarding the provincial official gazettes (BOP), see also section 11.6.
34. ^ Taking into account that both the "ELI domain" and the element eli:jurisdiction identify individually each gazette, it has been chosen only one value, instead of using the identification acronyms of each gazette (BOA, DOGV, BOPV…).
35. ^ With regard to the common metadata for local rules see also section section 11.7.
36. ^ Unless otherwise specified, references made to the official gazettes of the province contained in the Addendum are applicable to the official gazettes of the Autonomous Communities formed by a single province.
37. ^ According to article 197 of the Regulation of local entities organization, functioning and system, approved by Royal Decree 2568/1986, of 28 November "The capital of province local government or those with more than 50.000 inhabitants, as well as the provincial governments, will publish a municipal or provincial information gazette at least quarterly, including a summary with all the adopted agreements and resolutions. It will also be circulated according to Law 7/1985, of 2 April, and its development regulation, or when their spreading is worth because it contains exceptional measures, warnings for the neighborhood, historical references and provincial or local annals".
38. ^ This common repository is necessary also to provide the EU the information required by the Council of the EU conclusions of 2017.
39. ^ See section 4.2.
40. ^ The concepts of ELI ontology are described in section 5.1.
41. ^ See section 5.2.
42. ^ Definition of eli:is_member_of: «It indicates that this work is conceptually included in another one. Typically, the successive temporal versions of a given legislation are conceptually members of a single "abstract" resource. For the notion of physical inclusion, use eli:is_part_of».
43. ^ Definition of eli: has_member: «It indicates that this resource conceptually includes another one. For the notion of physical inclusion, use eli: has_part».
44. ^ If the existing document is bilingual, there will only be one legal expression.
45. ^ See section 5.3.
46. ^ Regarding the template URI for state and autonomic regulations see also section 7.
47. ^ According to the special features of their respective legal systems, the cities of Ceuta and Melilla should assess if they use the publication date of the date of the document to produce the URIs of ELI. This decision has to be published in their corresponding ELI webpage and applied uniformly to all their rules.
48. ^ Available at https://ssweb.seap.minhap.es/REL/
49. ^ For instance, if a specific mayoral decision or decree is considered to be of a regulation nature, the type "alia" should be assigned to it and not the type "resolución" or "decreto".
    In the same way, a regional decree enacted by the Diputación Foral or by the Diputado General should have the type "alia" assigned.
50. ^ Even if the corporation has a gazette of its own, in which the rule has been included, the date to be taken into account for the URI is exclusively the date of publication in the BOP or in the one province autonomic gazette.
51. ^ The use of the date of publication to form the URI is specifically admitted by the ELI standard "Various interpretations allowed depending on countries' requirements, e.g. date of signature or date of publication, etc."
52. ^ If the rule has an official number, the criteria established in section 7.4 are the ones to follow for the attribution of the eli:number.
53. ^ For example:

    in the BOP of 3 January 2021 a single rule of a same type has been published

    • eli/es-md-01860896/odnz/2021/01/03/(1)/dof

    in the BOP of 4 March 2021 several rules, but all with different type, have been published

    • eli/es-md-01860896/odnz/2021/03/04/(1)/dof
    • eli/es-md-01860896/reg/2021/03/04/(1)/dof
    • eli/es-md-01860896/alia/2021/03/04/(1)/dof

    in the BOP de 30 July 2020 several rules of the same type have been published

    • eli/es-md-01860896/odnz/2020/07/30/(1)/dof
    • eli/es-md-01860896/odnz/2020/07/30/(2)/dof
    • eli/es-md-01860896/odnz/2020/07/30/(3)/dof
    • eli/es-md-01860896/odnz/2020/07/30/(4)/dof

    in the BOP of 27 December 2020 several rules of different type have been published

    • eli/es-md-01860896/odnz/2020/12/27/(1)/dof
    • eli/es-md-01860896/odnz/2020/12/27/(2)/dof
    • eli/es-md-01860896/odnz/2020/12/27/(3)/dof
    • eli/es-md-01860896/odnz/2020/12/27/(4)/dof
    • eli/es-md-01860896/reg/2020/12/27/(1)/dof
    • eli/es-md-01860896/reg/2020/12/27/(2)/dof
    • eli/es-md-01860896/pre/2020/12/27/(1)/dof
54. ^ Those public administrations that have a corrected version (cer) can use this template component also.
55. ^ Otherwise the persistency of the URis could not be guaranteed.
56. ^ An example of implementation could be giving the responsibility of the URIs and ELI metadata to the official gazette of the province, so that the respective local entity that issues the provisions can create the URIs and ELI metadata for the rules. In the same way, the BOP could offer information about ELI in the local entities within its scope in its own website.
57. ^ The title is part of the text of the rule and allows its identification and quote. However, it is relatively frequent that the publication in the official gazettes of the province is done without mentioning the title or that when this title appears both in the summary and in the "inside" of the gazzete, it does not coincide.
    Fort the purpose of easing the access of the citizens to the legislation and improving the way of identification of the rules and the interoperability, the ELI project could be used to improve the attribution of titles to the published rules, so that the titles of the official gazette of the province are as close as possible to those used by the information systems of the local entities, which are the ones used in the daily practice to identify the rules.
58. ^ In case that the tacit approval is done without any action on the part of the plenary session of the entity, the date in which the rule is understood as approved, which is usually placed below the text, will be considered as date_document.

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