What is the difference between versions 1.0 and 1.1 of the XML namspaces recommendation?

XML Interview Questions and Answers

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64. What is the difference between versions 1.0 and 1.1 of the XML namspaces recommendation?

There are only two differences between XML namespaces 1.0 and XML namespaces 1.1:
* Version 1.1 adds a way to undeclare prefixes. For more information, see question 4.7.
* Version 1.1 uses IRIs (Internationalized Resource Identifiers) instead of URIs. Basically, URIs are restricted to a subset of ASCII characters, while IRIs allow much broader use of Unicode characters. For complete details, see section 9 of Namespaces in XML 1.1.
NOTE: As of this writing (February, 2003), Namespaces in XML 1.1 is still a candidate recommendation and not widely used. PART II: DECLARING AND USING XML NAMESPACES

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