NS EN 1546-4 : 1ED 1999

1 Scope
2 Normative references
3 Definitions, symbols and abbreviations
      3.1 Terms defined in prEN 1546-1
      3.2 Symbols and abbreviations
4 Description of the Dictionary mechanisms
      4.1 Introduction
      4.2 Indication of the use of TLV coding
      4.3 Structure of the headerlist
      4.4 Coding of the Tag field
      4.5 Coding of the length field
      4.6 Coding of Data Elements
      4.7 Reading out the Dictionary of an IEP
      4.8 Parsing a headerlist
      4.9 Headerlist mapping
Annex A (informative) Examples of the use of headerlists
Annex B (informative) Examples of Discretionary Data
Bibliography

Specifies required Tag values and outlines Dictionary mechanisms for their usefulness in achieving interoperability between IEP sytems where Data Elements are of different lengths, or the ordering of Data Elements in commands and responses differ from that specified in EN 1546-3. Mechanisms are based on TLV (Tag-length-value) definitions of each Data Element. Mechanisms and Tags are specified for handling of Discretionary Data elements in addition to those specified in EN 1546-3. Examples of utilization of Dictionaries are covered in the Annex.