BS EN 15380-1:2006 – Railway applications — Designation system for railway vehicles — Part 1: General principles
The prefix sign “&” according to EN 61355 is used for designating the document type. Prefix signs for other designation tasks are given in EN 61346-2.
5 Rules for the structure of designation sets
The following rules apply based on EN 61346-1 and EN 61346-2
Rule 1: The designation sets are identified by prefix signs, with their own data positions.
Rule 2: The designation sets are subdivided into classes. These consist of one or more subclasses. Within one designation set, the entities decreasing in interest are designated from left to right.
Rule 3: Each subclass consists of a maximum of three data positions not all of which, however, have to be written, depending on the case. Within a subclass, only alphabetical (A) or numerical (N) characters are permitted.
Rule 4: Only Latin upper cases letters from A to Z excluding “I” and “O” are permitted as alphabetical data positions. For numerical data positions, Arabic numerals are used.
Rule 5: Subclasses at the beginning and/or end of a designation set can be omitted. The rules on this are specified in this technical standard.
Rule 6: Certain designation sets are subdivided between classes by the classification character ” . ” with its own data position. If the designation set is subdivided by the classification character ” . ” (ASCII Code 46 according to ISO/IEC 8859-1), rule 5 applies for the parts of the designation set to the left and right of the classification character.
NOTE The combination of designation sets and the method of writing the characters are described in clause 7.
6 Structure and content of the designation sets
6.1 General
The structure and content of the designation sets are illustrated in the following subclauses. For the individual designation sets, the structure specified for railway vehicles is illustrated in each case with the number of the subclasses and data positions used.
NOTE See Annexes B and C.
6.2 Function aspect
6.2.1 “Function-oriented structure” designation set
This designation set is used to designate functional relationships between the functional agents of a railway vehicle; a new draft is in preparation. The structure is shown in Figure 1.
BS EN 15380-1:2006 – Railway applications — Designation system for railway vehicles — Part 1: General principles