ISO/IEC 8825-4:2008 Withdrawn
Information technology -- ASN.1 encoding rules: XML Encoding Rules (XER)
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:
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.
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.
Additional information
Publication type | International Standard |
---|---|
Publication date | 2008-12-15 |
Withdrawal date | 2015-11-12 |
Edition | 2.0 |
Available language(s) | English |
TC/SC | ISO/IEC JTC 1/SC 6 - Telecommunications and information exchange between systemsrss |
ICS | 35.100.60 - Presentation layer |
Stability date | 2015 |
Pages | 72 |
File size | 629 KB |
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