Validation of anyURI

[Sab]

Hi,
I'm writing a rendering layer for asp.net apps that renders xdime markup. I
need all URLs used in the app to be absolute or relative. Whenever I use an
absolute URL, something like '/myPage/LogOut.aspx' as an attribute of type
anyURI the document validation fails with the error 'attribute has an invalid
value according to its data type'.
If I remove the leading '/' then the .Net reader validates the file fine.
Altova XmlSpy is happy to validate the xml irrespective of the leading '/'.
The schema I am validating agains belongs to someone else, so I cannot
change the type of the anyURI attributes.
Is this behaviour correct? Is there any way to get the .Net validator to
understand that absolute URIs are valid?
Thanks for reading,
Sab

[Derek Harmon]

"Sab" <Sa*@discussions.microsoft.com> wrote in message news:91**********************************@microsof t.com...

absolute URL, something like '/myPage/LogOut.aspx' as an attribute of type
anyURI the document validation fails with the error 'attribute has an invalid
value according to its data type'. : : Is this behaviour correct?
XML Schema : Part 2, sect. 3.2.17.1, basically states that the formatting of
an xs:anyURI value must meet the requirements of RFC2396.

RFC2396, section 5 governing relative references identifies a URI starting
with a single '/' as an abs_path, which is an absolute reference without a
scheme (which otherwise couldn't be empty) or colon.

Therefore, I'd conclude it's incorrect for the validator to rule the value
invalid.
Is there any way to get the .Net validator to understand that absolute
URIs are valid?

I would wrap your input source in a custom XmlTextReader that strips
leading '/' off of attribute values it reports to the XmlValidatingReader.
Inject this custom XmlTextReader as a filter between the XmlValidating
Reader and your input source.

Subclass XmlTextReader and override the properties and methods
that access individual attributes. Whenever the consumer asks your
custom XmlTextReader for an attribute value, strip off the leading '/'
if it has one and return the modified value. In this way, XmlValidating-
Reader will only see relative references that it can accept as valid.
Derek Harmon