STANDARD
ISO/IEC 8825-4:2015
Issue date: 2015 11 12
Information technology — ASN.1 encoding rules: XML Encoding Rules (XER) — Part 4:
ISO/IEC 8825-4:2015 specifies a set of basic XML Encoding Rules (BASIC-XER) that may be used to derive a transfer syntax for values of types defined in Rec. ITU-T X.680 | ISO/IEC 8824-1 and Rec. ITU-T X.681 | ISO/IEC 8824-2. This Recommendation | International Standard 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. This Recommendation | International Standard further specifies a set of extended XML Encoding Rules (EXTENDED-XER) which adds further encoders 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 this Recommendation | International Standard:
- 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 Rec. ITU-T X.680 | ISO/IEC 8824-1.
ISO/IEC 8825-4:2015 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.
General information on ISO/IEC 8825-4:2015
Timeline
An overview of the development of ISO/IEC 8825-4:2015 from 2002 til today.
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ISO/IEC 8825-4:2021Information technology — ASN.1 encoding rules — Part 4: XML Encoding Rules (XER)
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ISO/IEC 8825-4:2015Information technology — ASN.1 encoding rules: XML Encoding Rules (XER) — Part 4:
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ISO/IEC 8825-4:2008/Cor 2:2014Information technology — ASN.1 encoding rules: XML Encoding Rules (XER) — Part 4: — Technical Corri...
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ISO/IEC 8825-4:2008/Cor 1:2012Information technology — ASN.1 encoding rules: XML Encoding Rules (XER) — Part 4: — Technical Corri...
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ISO/IEC 8825-4:2008Information technology — ASN.1 encoding rules: XML Encoding Rules (XER) — Part 4:
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ISO/IEC 8825-4:2002/Amd 3:2008Information technology — ASN.1 encoding rules: XML Encoding Rules (XER) — Part 4: — Amendment 3: PE...
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ISO/IEC 8825-4:2002/Amd 2:2006Information technology — ASN.1 encoding rules: XML Encoding Rules (XER) — Part 4: — Amendment 2: Ti...
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ISO/IEC 8825-4:2002/Amd 1:2004Information technology — ASN.1 encoding rules: XML Encoding Rules (XER) — Part 4: — Amendment 1: EX...
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ISO/IEC 8825-4:2002Information technology — ASN.1 encoding rules: XML Encoding Rules (XER) — Part 4:
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