ITU

Committed to connecting the world

ITU-T Recommendations

Search by number:
Others:
Skip Navigation Links
Advanced search
Provisional name
ISO/IEC Number
Formal description
Study Groups tree viewExpand Study Groups tree view

ITU-T X.690 (11/2008)

عربي | 中文 | English | Español | Français | Русский
信息技术 – ASN.1编码规则:基本编码规则(BER)、规范编码规则(CER)和唯一编码规则(DER)
本建议书 | 国际标准定义了一组基本编码规则(BER),可用于利用ASN.1符号定义的各类数值。这些编码规则的应用产生了用于这些值的传送语法。这些编码规则的规范暗示,它们也会被用于解码。本建议书 | 国际标准还定义了一组区分编码规则(DER)和一套规范编码规则(CER),以便对基本编码规则(BER)加以约束。它们之间的主要区别是,DER使用确定长度的编码形式,而CER使用不确定长度的编码形式。DER是更适合于小的编码数值,而CER更适合大的数值。这一编码规范暗示,它们也被用于解码。
Citation: http://handle.itu.int/11.1002/1000/9608
Approval date: 2008-11-13
Identical standard:ISO/IEC 8825-1:2008 (Common)
Approval process:AAP
Status: In force
Maintenance responsibility: ITU-T Study Group 17
Further details: Patent statement(s)
Development history
[20 related work items in progress]
Ed. ITU-T Recommendation Status Summary Table of Contents Download
4.2 X.690 (2008) Cor. 2 (03/2014) In force
here
- here
4.1 X.690 (2008) Cor. 1 (10/2011) In force - - here
4 X.690 (11/2008) In force
here
here
here
3.3 X.690 (2002) Technical Cor. 1 (05/2007) Superseded
here
- here
3.2 X.690 (2002) Amd. 2 (06/2006) Superseded
here
here
here
3.1 X.690 (2002) Amd. 1 (10/2003) Superseded
here
here
here
3 X.690 (07/2002) Superseded - - here
2.3 X.690 (1997) Technical Cor. 2 (02/2001) Superseded
here
here
here
2.2 X.690 (1997) Amd. 1 (06/1999) Superseded
here
here
here
2.1 X.690 (1997) Technical Cor. 1 (06/1999) Superseded
here
here
here
2 X.690 (12/1997) Superseded
here
here
here
1.3 X.690 (1994) Technical Cor. 3 (12/1997) Superseded - - here
1.2 X.690 (1994) Technical Cor. 2 (12/1997) Superseded - - here
1.1 X.690 (1994) Technical Cor. 1 (11/1995) Superseded - - here
1 X.690 (07/1994) Superseded - - here