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Reference ISO/IEC 8825-4 ed2.0 withdrawn corrigendum
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Title Information technology -- ASN.1 encoding rules: XML Encoding Rules (XER)
Publication date 2008-12-15
Format, price
(Swiss francs)
and language
178.- 72 pages
178.- 564 Kb
 
Abstract ISO/IEC 8825-4:2008 specifies a set of basic XML Encoding Rules (BASIC-XER) that can be used to derive a transfer syntax for values of types defined in ISO/IEC 8824-1 and ISO/IEC 8824-2. It also specifies a set of Canonical XML Encoding Rules (CXER) which provide constraints on the basic XML Encoding Rules and produce a unique encoding for any given ASN.1 value. ISO/IEC 8825-4:2008 further specifies a set of extended XML Encoding Rules (EXTENDED-XER) which adds further encoder options, and also allows the ASN.1 specifier to vary the encoding that would be produced by BASIC-XER. It is implicit in the specification of these encoding rules that they are also used for decoding.

The encoding rules specified in ISO/IEC 8825-4:2008:

  • are used at the time of communication;

  • are intended for use in circumstances where displaying of values and/or processing them using commonly available XML tools (such as browsers) is the major concern in the choice of encoding rules;

  • allow the extension of an abstract syntax by addition of extra values for all forms of extensibility described in ISO/IEC 8824-1.



ISO/IEC 8825-4:2008 also specifies the syntax and semantics of XER encoding instructions, and the rules for their assignment and combination. XER encoding instructions can be used to control the EXTENDED-XER encoding for specific ASN.1 types.
Technical Committee JTC 1/SC 6 - Telecommunications and information exchange between systems  RSS
ICS Codes
35.100.60 Presentation layer
 
Replaced by
 
Work in progress
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