Pointless Mixed Content for ContentType

[Steven Legg <steven.legg@enitiatives.com.au>]

The ContentType XML Schema type in the XACML 3.0 core specification (Committee
Specification 01) is defined to have mixed content. However, given the way in
which the content of the <Content> element is used to construct an XML data
structure for XPath processing, any non-whitespace characters before or after
the single child element of the <Content> element would result in an XML
document that is not well-formed. For example, given this <Content> element:

    <xacml:Content>
     foobar
     <widget/>
     foobar
    </xacml:Content>

which satisfies the ContentType definition, the corresponding XML document for
XPath processing would look like this:

    <?xml version="1.0" encoding="UTF-8"?>
     foobar
     <widget/>
     foobar

which is clearly invalid. The "mixed" attribute should be removed from the
definition of ContentType.

Regards,
Steven