PREN 15380-4 : DRAFT 2009

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Functional structure
  5.1 General remarks
  5.2 Indication systematic
  5.3 Code letters
      5.3.1 Code letters used to designate 1[st] level
            function groups
      5.3.2 Code letters used to designate function
            groups from the 1[st] to the 3[rd] level
  5.4 Transverse functions
Annex A (informative) - Functions on level 4 and level 5
Annex B (informative) - Interrelation between EN 15380-2
        and EN 15380-4
Annex C (informative) - Elementary functions
Annex D (informative) - Code letters used to designate detail
        Properties
  D.1 General
  D.2 Indication systematic
Annex E (informative) - Example for a complete structure
        of function groups
Annex F (normative) - Rules to define the function level
Annex G (informative) - Rules to create function names
  G.1 General
  G.2 Function terms
  G.3 Rules for creating function short names
Bibliography

Specifies the generation and interpretation of railway specific functional structures during the life cycle of a railway vehicle or its assemblies.