There are three European standardization bodies in the European Union (EU): The European Committee for Standardization (CEN), European Committee for Electrotechnical Standardization (CENELEC), and the European Telecommunications Standards Institute (ETSI). Standards adopted by any of these three standardization bodies may become a European Standard (EN).
A European Standard is developed from a standard proposal submitted by the three European standardization bodies, by national standardization bodies such as Deutsches Institut für Normung e.V. (DIN) or by international organizations. If the proposal meets with approval, it is then passed to a Technical Committee (TC), which prepares a preliminary draft European Standard. The draft standard, which is open to public discussion, incorporates the justified submissions and is then used to produce the final draft. This is published by the national standards bodies, which must also approve the final draft. This is followed by ratification and adoption of the European Standard as a national standard by the national standards bodies.
The European Standards are subject to a numbering plan, which shows which European standardization body has developed the standards or whether it is an international standard.
The status of the standardization documents of the European Normative (EN) is marked in such a way that all parties involved in the standardization can recognize from the marking which status the document is currently in. For example, the Date of Announcement (doa) is the announcement date for a standardization document, and the Date of Availability (dav) identifies an approved document. Date of Publication (dop) is the publication date on which the national standard is published and Date of Ratification (dor) is the ratification date on which the standard was ratified. If standards are withdrawn, they are marked by Date of Withdrawel (dow) and if they expire by Date of Cessation (doc).