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ISO/IEC 8825-4

Information technology - ASN.1 encoding rules: XML Encoding Rules (XER)

active
Organization: ISO
Publication Date: 15 November 2015
Status: active
Page Count: 90
ICS Code (Presentation layer): 35.100.60
scope:

This Recommendation | International Standard 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.

This Recommendation | International Standard 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.

Document History

September 28, 2020
Information technology — ASN.1 encoding rules — Part 4: XML Encoding Rules (XER)
This Recommendation | International Standard 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 |...
May 1, 2018
Information technology - ASN.1 encoding rules: XML Encoding Rules (XER) - Part 4 TECHNICAL CORRIGENDUM 1
A description is not available for this item.
ISO/IEC 8825-4
November 15, 2015
Information technology - ASN.1 encoding rules: XML Encoding Rules (XER)
This Recommendation | International Standard 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 |...
September 15, 2014
Information technology - ASN.1 encoding rules: XML Encoding Rules (XER) TECHNICAL CORRIGENDUM 2
A description is not available for this item.
December 1, 2012
Information technology - ASN.1 encoding rules: XML Encoding Rules (XER) TECHNICAL CORRIGENDUM 1
A description is not available for this item.
December 15, 2008
Information technology - ASN.1 encoding rules: XML Encoding Rules (XER)
This Recommendation | International Standard 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 ITU-T Rec. X.680 |...
April 1, 2008
Information technology - ASN.1 encoding rules: XML Encoding Rules (XER) - AMENDMENT 3: PER encoding instructions
A description is not available for this item.
December 15, 2006
Information technology - ASN.1 encoding rules: XML Encoding Rules (XER) AMENDMENT 2: Time type support
A description is not available for this item.
October 15, 2004
Information technology - ASN.1 encoding rules: XML Encoding Rules (XER) AMENDMENT 1: EXTENDED-XER
A description is not available for this item.
December 15, 2002
Information technology - ASN.1 encoding rules: XML Encoding Rules (XER)
A description is not available for this item.

References

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