• From: "Michael Kay" <mike@s...>
• To: "'Jeff Greif'" <jgreif@a...>,<xml-dev@l...>
• Date: Thu, 6 May 2010 10:10:36 +0100

Like many omissions in XSD 1.0, this one is tidied up in XSD 1.1: see

http://www.w3.org/TR/xmlschema11-1/#src-resolve (clause 4.2.3)

You'll see that this clause is missing from XSD 1.0:

http://www.w3.org/TR/xmlschema-1/#src-resolve

which is a known bug.

Regards,

Michael Kay
http://www.saxonica.com/
http://twitter.com/michaelhkay  

> -----Original Message-----
> From: Jeff Greif [mailto:jeff.greif@g...] On Behalf Of Jeff Greif
> Sent: 06 May 2010 04:48
> To: xml-dev@l...
> Subject:  Need to import the XML schema namespace
> 
> Most XML Schemas in the wild reference some of the types in 
> the http://www.w3.org/2001/XMLSchema namespace, but they 
> usually do so without explicitly importing it, so it 
> apparently unnecessary in practice, if not normatively.
> 
> I can't find any reference in the XML Schema 1.0 spec that 
> says it is either illegal or unnecessary to import this 
> namespace, for example, using xs:import.  Similarly, I can't 
> find any further interoperability guidelines on this subject 
> in the WSI-Basic Profile 1.0.
> 
> Does anyone have a reference to a definitive statement of 
> whether this import is required, optional or forbidden in XML 
> Schemas that reference the data types of this namespace?
> 
> Jeff
> 
> 
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