Canonical XML 1.1

John M. Boyer, Glenn Marcy

John M. Boyer, Glenn Marcy, Canonical XML 1.1, World Wide Web Consortium, Recommendation REC-xml-c14n11-20080502, May 2008.

Canonical XML Version 1.1 is a revision to Canonical XML Version 1.0 to address issues related to inheritance of attributes in the XML namespace when canonicalizing document subsets, including the requirement not to inherit xml:id, and to treat xml:base URI path processing properly. Any XML document is part of a set of XML documents that are logically equivalent within an application context, but which vary in physical representation based on syntactic changes permitted by XML 1.0 and Namespaces in XML 1.0. This specification describes a method for generating a physical representation, the canonical form, of an XML document that accounts for the permissible changes. Except for limitations regarding a few unusual cases, if two documents have the same canonical form, then the two documents are logically equivalent within the given application context. Note that two documents may have differing canonical forms yet still be equivalent in a given context based on application-specific equivalence rules for which no generalized XML specification could account. Canonical XML Version 1.1 is applicable to XML 1.0 and defined in terms of the XPath 1.0 data model. It is not defined for XML 1.1.


Keywords: Canonical XML;

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