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ITU-T X.691 (02/2021)

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Information technology - ASN.1 encoding rules: Specification of Packed Encoding Rules (PER)
Recommendation ITU-T X.691 | ISO/IEC 8825-2 describes a set of encoding rules that can be applied to values of all ASN.1 types to achieve a much more compact representation than that achieved by the Basic Encoding Rules and its derivatives (described in Rec. ITU-T X.690 | ISO/IEC 8825-1).
Citation: https://handle.itu.int/11.1002/1000/14473
Series title: X series: Data networks, open system communications and security
  X.600-X.699: OSI networking and system aspects
  X.680-X.699: Abstract Syntax Notation One (ASN.1)
Approval date: 2021-02-13
Identical standard:ISO/IEC 8825-2 (Common)
Approval process:AAP
Status: In force
Maintenance responsibility: ITU-T Study Group 17
Further details: Patent statement(s)
Development history
Ed. ITU-T Recommendation Status Summary Table of Contents Download
6 X.691 (02/2021) In force
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5.1 X.691 (2015) Cor. 1 (10/2016) Superseded
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5 X.691 (08/2015) Superseded
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4.4 X.691 (2008) Cor. 4 (11/2014) Superseded
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4.3 X.691 (2008) Cor. 3 (11/2014) Superseded
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4.2 X.691 (2008) Cor. 2 (04/2012) Superseded
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4.1 X.691 (2008) Cor. 1 (10/2011) Superseded - - here
4 X.691 (11/2008) Superseded
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3.5 X.691 (2002) Amd. 3 (05/2007) Superseded
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3.4 X.691 (2002) Amd. 2 (06/2006) Superseded
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3.3 X.691 (2002) Technical Cor. 2 (11/2005) Superseded
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3.2 X.691 (2002) Technical Cor. 1 (05/2005) Superseded
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3.1 X.691 (2002) Amd. 1 (10/2003) Superseded
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3.0 X.691 (2002) Erratum 1 (06/2003) Superseded - - here
3 X.691 (07/2002) Superseded - - here
2.4 X.691 (1997) Technical Cor. 3 (03/2001) Superseded
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2.3 X.691 (1997) Technical Cor. 2 (02/2001) Superseded
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2.2 X.691 (1997) Amd. 1 (06/1999) Superseded
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2.1 X.691 (1997) Technical Cor. 1 (06/1999) Superseded
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2 X.691 (12/1997) Superseded
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1.2 X.691 (1995) Technical Cor. 2 (12/1997) Superseded - - here
1.1 X.691 (1995) Technical Cor. 1 (12/1997) Superseded - - here
1 X.691 (04/1995) Superseded - - here