1. ENTSO-E Metadata Repository Introduction https://emr.entsoe.eu

2. ENTSO-E Metadata Repository EMR: https://emr.entsoe.euhttps://emr.entsoe.eu Introduction The EMR Glossary of Electricity Transmission Terms contains a comprehensive set of definitions collected by the European Network of Transmission System Operators for Electricity (http://www.entsoe.eu).http://www.entsoe.eu The definitions in the EMR Glossary are primarily drawn from existing National TSO Glossaries as well as drafts of EU legislation acts (EU Regulation and Directives). The source information provided relates to the source from where the definition was extracted for inclusion in the EMR Glossary. This source document may not in fact have been the original source of the definition. It should be emphasised that some terms collected by the EMR are based on national definitions. These may, for a number of reasons, depart from definitions contained in European Regulations or Directives. INTRODUCTION USE OF EMR STRUCTURE OF THE GLOSSARY THE GLOSSARY HARMONIZARION OF DEFINITIONS REVIEWING A DEFINITION FEEDBACK CONTACT

3. ENTSO-E Metadata Repository EMR: https://emr.entsoe.euhttps://emr.entsoe.eu Uses of EMR The main aims of the EMR Glossary are to provide a: highly visible and readily accessible source of definitions for use by ENTSO-E members or stakeholders. The Glossary is intended to facilitate the collection of consistent terms between all possible sources; set of target definitions based on existing international standards (ISO-11179); online process, which will help the harmonization of the definitions, which are included in the development of the Network Codes; catalyst for the development of consistent and harmonized definitions between all sources. The EMR glossary highlights areas of existing inconsistencies between various definitions and is designed to help prevent similar occurrences events in the future. INTRODUCTION USE OF EMR STRUCTURE OF THE GLOSSARY THE GLOSSARY HARMONIZARION OF DEFINITIONS REVIEWING A DEFINITION FEEDBACK CONTACT

4. ENTSO-E Metadata Repository EMR: https://emr.entsoe.euhttps://emr.entsoe.eu Structure of the Glossary The EMR Glossary of Electrotechnical Terms contains a comprehensive set of definitions The main elements of the current version of the EMR glossary are: unique title for the definition; text outlining the actual definition; detailed source information; internal cross-links to related definitions, etc., contained elsewhere in the Glossary; URL link to the source of the definition where this is currently located on the internet. The Glossary also includes powerful search and a web service to export glossary terms into remote applications. INTRODUCTION USE OF EMR STRUCTURE OF THE GLOSSARY THE GLOSSARY HARMONIZARION OF DEFINITIONS REVIEWING A DEFINITION FEEDBACK CONTACT

5. ENTSO-E Metadata Repository EMR: https://emr.entsoe.euhttps://emr.entsoe.eu INTRODUCTION USE OF EMR STRUCTURE OF THE GLOSSARY THE GLOSSARY HARMONIZARION OF DEFINITIONS FEEDBACK CONTACT

6. ENTSO-E Metadata Repository EMR: https://emr.entsoe.euhttps://emr.entsoe.eu INTRODUCTION USE OF EMR STRUCTURE OF THE GLOSSARY THE GLOSSARY HARMONIZARION OF DEFINITIONS REVIEWING A DEFINITION FEEDBACK CONTACT Harmonization of definitions All terms in the EMR Glossary are meant to be unique. In a relatively small number of cases however, several definitions may exist for the one term. This occurs, for example, when a definition have been prepared in the context of a Network Code while another definition is developed by a National TSO Glossary to meet their particular requirements. The majority of these inconsistencies are negligible and appear due to the fact that one of the two existing definitions have a more detailed/specific content. In the particular case when a term has more than one definitions, a version number follows the term name.

7. ENTSO-E Metadata Repository EMR: https://emr.entsoe.euhttps://emr.entsoe.eu INTRODUCTION USE OF EMR STRUCTURE OF THE GLOSSARY THE GLOSSARY HARMONIZARION OF DEFINITIONS REVIEWING A DEFINITION FEEDBACK CONTACT Harmonization of definitions All terms in the EMR Glossary are meant to be unique. In a relatively small number of cases however, several definitions may exist for the one term. This occurs, for example, when a definition have been prepared in the context of a Network Code while another definition is developed by a National TSO Glossary to meet their particular requirements. The majority of these inconsistencies are negligible and appear due to the fact that one of the two existing definitions have a more detailed/specific content. In the particular case when a term has more than one definitions, a version number follows the term name. To remove the existing inconsistencies the EMR includes a build-in engine, which is called "Definition Workflow" and which has been designed to improve the quality of the definitions.

8. ENTSO-E Metadata Repository EMR: https://emr.entsoe.euhttps://emr.entsoe.eu INTRODUCTION USE OF EMR STRUCTURE OF THE GLOSSARY THE GLOSSARY HARMONIZARION OF DEFINITIONS REVIEWING A DEFINITION FEEDBACK CONTACT Harmonization of definitions The procedure is simple: After a new or an existing definition is discussed in a Working Group (e.g. NC Drafting Team), the term is submitted to EMR for approval. The Definition Workflow starts automatically and makes sure that experts from all ENTSO-E Business Areas (SOC, SDC, MC, Legal, R&D) will have the opportunity to review the proposal and give their feedback. When certain improvements are made by the experts, the workflow is completed and the newly harmonized definition becomes a standard term in ENTSO-E.

9. ENTSO-E Metadata Repository EMR: https://emr.entsoe.euhttps://emr.entsoe.eu INTRODUCTION USE OF EMR STRUCTURE OF THE GLOSSARY THE GLOSSARY HARMONIZARION OF DEFINITIONS REVIEWING A DEFINITION FEEDBACK CONTACT Harmonization of definitions During the life-cycle of a term, certain steps are necessary, in order to guarantee that a certain level of quality is achieved. These steps are the proposal, validation, review, consolidation and approval. These steps are not done automatically, but they require the contribution of people under specific roles and responsibilities. These roles, who are assigned on experts around the Association, are Submitter (proposes a new term or update of an existing definition); ENTSO-E and Data Expert Group (checks the validity of the proposal); Data Trustee (selects the Reviewers and makes the final check); Data Custodian (updates/consolidates the proposal); Reviewer (reviews the proposed definition); SDGS (makes the final Approval)

10. ENTSO-E Metadata Repository EMR: https://emr.entsoe.euhttps://emr.entsoe.eu INTRODUCTION USE OF EMR STRUCTURE OF THE GLOSSARY THE GLOSSARY HARMONIZARION OF DEFINITIONS REVIEWING A DEFINITION FEEDBACK CONTACT Being a reviewer is a simple task: Once you receive the e-mail from the EMR, you only have to sign in to the tool and navigate to your open task(s). A detailed description of all steps required by the reviewers is given here: https://emr.entsoe.eu/glossary/bin/view/CustomizationsCode/Reviewer

11. ENTSO-E Metadata Repository EMR: https://emr.entsoe.euhttps://emr.entsoe.eu INTRODUCTION USE OF EMR STRUCTURE OF THE GLOSSARY THE GLOSSARY HARMONIZARION OF DEFINITIONS REVIEWING A DEFINITION FEEDBACK CONTACT Feedback by every TSO members The Glossary is constantly evolving with regards to both definitional content and facilities for its use. Comments and suggestions are welcome by all TSO members (through use of the comment area, below each term or by email directly to the EMR at “glossary@entsoe.eu”). Comments are particularly encouraged on the definitions currently included in the Glossary, in cases where: there may be more appropriate definitions that should be incorporated in preference to those already listed; definitions for other topics, concepts should also be included; or reference/source information may not be sufficiently detailed.

12. ENTSO-E Metadata Repository EMR: https://emr.entsoe.euhttps://emr.entsoe.eu Contact EMR Team: glossary@entsoe.euglossary@entsoe.eu Ioannis Daoutidis: ioannis.daoutidis@entsoe.eu Metadata Administratorioannis.daoutidis@entsoe.eu INTRODUCTION USE OF EMR STRUCTURE OF THE GLOSSARY THE GLOSSARY HARMONIZARION OF DEFINITIONS REVIEWING A DEFINITION FEEDBACK CONTACT

13. ENTSO-E Metadata Repository – Definition workflow Submit ENTSO-E and DEG Data Trustee Approval Review phase Standard (highest level of quality) Candidate Time Status Introduction to EMR, Stuttgart, 16 th January 2013 No 1 Rule: Term needs to be reviewed by all business areas

14. DEG Subject Matter Experts ENTSO-E Metadata Repository – Definition workflow Submitter ENTSO-E Data Trustee (DEG,WG member) Data Custodian Reviewers Review phase Standard 100% Candidate 0% Reviewed 70% Qualified 50% Approval Pending 90% Proposes a term Rejects/qualifies term Assign Reviewers Set deadline Review Term Consolidate definition Finalize Approval Validate proposal Status SDGS EMR: https://emr.entsoe.euhttps://emr.entsoe.eu Life-cycle of term