RE: [saml-dev] Why is ID of type ID, whereas InResponseTo is of type NCName? And why is AssertionIDRef of type NCName?

["Cahill, Conor P" <conor.p.cahill@intel.com>]

 

InResponseTo does not refer to an element in the same XML document so it should not be related to XML ID processing.

 

XML ID type is a special flag for parsers which enables them to match local document references.

 

I think the key is that both types allow/require the same format of data, but keeping them of different types is the right thing to do so that they are not interpreted as local references (which they aren't).

 

Conor

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From: Costello, Roger L. [mailto:costello@mitre.org]
Sent: Monday, June 12, 2006 8:40 AM
To: saml-dev@lists.oasis-open.org
Subject: [saml-dev] Why is ID of type ID, whereas InResponseTo is of type NCName? And why is AssertionIDRef of type NCName?

Hi Folks,

 

In saml-schema-assertion-2.0.xsd it defines:

 

-        The ID attribute to be of type ID

-        The InResponseTo attribute to be of type NCName

-        The AssertionIDRef element to be of type NCName

 

I thought that ID, InResponseTo, and AssertionIDRef all contain the same type of value? 

 

The value of InResponseTo must equal the value of an ID, and the value of AssertionIDRef must equal the value of an ID, right?

 

If so, then why are they declared to be of different types?

 

/Roger