Re: [xacml] 134c: Datatypes for predefined attribute-ids,141 - data type uri's.

[Satoshi Hada <SATOSHIH@jp.ibm.com>]

How about using QName not only for DataType but also for FunctionId,
MatchId, and any other attributes specifying some identifier?

Personally, I like QName because
1) QName can be shorter than URI.
2) QName has a clear separation between the namespace and the local name.

Satoshi Hada
IBM Tokyo Research Laboratory
mailto:satoshih@jp.ibm.com


|---------+---------------------------->
|         |           Simon Godik      |
|         |           <simon@godik.com>|
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|         |           2002/10/29 14:09 |
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  |       To:       xacml@lists.oasis-open.org                                                                               |
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  |       Subject:  [xacml] 134c: Datatypes for predefined attribute-ids, 141 - data type uri's.                             |
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Attached is appendix B with datatypes for  predefined identifiers.(See note
below)

[0141]. data type uri's.
Is DataType attribute QName or URI? I've been  advocating URI up to now
(even on today's schema call)
but I've changed my mind to QName. QName evaluates  into expanded name
which is a pair: (URI, local_name).
Expanded name MUST be used in all operations  involving DataType attribute
of the xacml:AttributeDesignator,
xacml:AttributeSelector, xacml:AttributeValue, and
xacml-context:Attribute.

Eg: <Attribute AttributeId="..."  DataType="xsi:string"/>
Expanded name: http://www.w3c.org/2001/XMLSchema,  string

If expanded name is used, we do not have to specify  how to form URI out of
this pair.

For those who care: I was advocationg URI  for the DataType because I
thought that expanded qname
must be somehow concatenated into one value. URI is  already one value. But
many times we have to
invent this URI by using the same concatenation. If  we compare expanded
names as pairs we do not have
this problem.

Simon



#### XACML identifiers.doc has been removed from this note on October 31
2002 by Satoshi Hada