[W3C-XSD]	W3C Recommendation (2 May 2001) XML Schema part 1 and part 2 http://www.w3.org/TR/2001/REC-xmlschema-1-20010502 http://www.w3.org/TR/2001/REC-xmlschema-2-20010502
[W3C-XML]	W3C Recommendation (6 October 2000) Extensible Markup Language (XML) 1.0 (Second Edition) http://www.w3.org/TR/2000/REC-xml-20001006
[X.694]	ITU-T Rec. X.694 (01/2004) | ISO/IEC 8825-5 : 2004 Information Technology – ASN.1 encoding rules: Mapping W3C XML schema definitions into ASN.1 http://www.itu.int/rec/recommendation.asp?type=folders&parent=T-REC-X.694 http://www.itu.int/ITU-T/studygroups/com17/languages/index.html (free Download)
[X.690]	ITU-T Rec. X.690(07/2002) | ISO/IEC 8825-1:2002, Information Technology - ASN.1 Encoding Rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) http://www.itu.int/rec/recommendation.asp?type=folders&lang=e&parent=T-REC-X.690 http://www.itu.int/ITU-T/studygroups/com17/languages/index.html (free Download)
[X.690 Amendment 1]	ITU-T Rec. X.690 (07/2002)/Amd.1(10/2003) | ISO/IEC 8825-1:2002/Amd 1:2004 Information Technology - ASN.1 Encoding Rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) Amendment 1 : Support for EXTENDED-XER http://www.itu.int/rec/recommendation.asp?type=folders&lang=e&parent=T-REC-X.690 http://www.itu.int/ITU-T/studygroups/com17/languages/index.html (free Download
[X.691]	ITU-T Rec. X.691 (07/2002) | ISO/IEC 8825-2:2002 Information Technology - ASN.1 Encoding Rules: Specification of Packed Encoding Rules (PER) http://www.itu.int/rec/recommendation.asp?type=folders&lang=e&parent=T-REC-X.691 http://www.itu.int/ITU-T/studygroups/com17/languages/index.html (free Download)
[X.691 Amendment 1]	ITU-T Rec. X.691 (07/2002) )/Amd.1(10/2003) | ISO/IEC 8825-2:2002/Amd 1:2004 Information Technology - ASN.1 Encoding Rules: Specification of Packed Encoding Rules (PER) Amendment 1 : Support for EXTENDED-XER http://www.itu.int/rec/recommendation.asp?type=folders&lang=e&parent=T-REC-X.691 http://www.itu.int/ITU-T/studygroups/com17/languages/index.html (free Download)
[X.693]	ITU-T Rec. X.693 (12/2001) | ISO/IEC 8825-4:2002, Information Technology - ASN.1 Encoding Rules: XML Encoding Rules (XER) http://www.itu.int/rec/recommendation.asp?type=folders&lang=e&parent=T-REC-X.693 http://www.itu.int/ITU-T/studygroups/com17/languages/index.html (free Download)
[X.693 Amendement 1]	ITU-T Rec. X.693 (12/2001)/Amd.1(10/2003) | ISO/IEC 8825-4:2002/Amd 1:2004, Information Technology - ASN.1 Encoding Rules: XML Encoding Rules (XER) Amendment 1 : XER encoding instructions and EXTENDED-XER http://www.itu.int/rec/recommendation.asp?type=folders&lang=e&parent=T-REC-X.693 http://www.itu.int/ITU-T/studygroups/com17/languages/index.html (free Download)