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Subject: Re: [xacml] [policy model]: Object semantics proposal


i am having a hard time visualizing a regular expression evaluating
hierarchical data structures. can you give an example? from your
previous examples, my thinking was that it would be used solely to
evaluate linear (string) values.

b

Michiharu Kudoh wrote:
> 
> I think regex expressions could provide wider expressive power.
> What I worried about was there seems to be no standard or no de-fact
> standard for representing regular expression on tree structures.
> Moreover, there seems to be no available algorithms or software products.
> It could require a mechanism for making tree pattern matching and more.
> Does anyone know about this?
> 
> regards,
> Michiharu Kudo
> 
> From: bill parducci <bill@parducci.net> on 2001/10/26 19:39
> 
> Please respond to bill parducci <bill@parducci.net>
> 
> To:   Michiharu Kudoh/Japan/IBM@IBMJP
> cc:   xacml@lists.oasis-open.org
> Subject:  Re: [xacml] [policy model]: Object semantics proposal
> 
> in addressing the topic of section 2.2 (Object Hierarchy With Wild Card
> Notation) i would like to propose that we consider regex expressions
> instead of simple wildcards. this will allow for much more robust
> decision request attributes. to put it in context with michaharu's
> example...
> 
> in a system where you have the follwing:
> 
> c:/winnt/system32
> c:/winnt2/system32
> c:/winnt3/system32
> c:/winnt4/system32
> c:/winnt5/system32
> c:/winnt[n]/system32
> 
> and you wanted access to only:
> 
> c:/winnt3/system32
> c:/winnt4/system32
> c:/winnt5/system32
> 
> you could express this as
> path="c:/winnt[345]/system32"
> 
> rather than list each individually (as would be necessary with just "*"
> notations).
> 
> b
> 
> Michiharu Kudoh wrote:
> >
> > I post a proposal of object semantics.
> > It is similar to the one I posted last week.
> >
> > (See attached file: XACMLObjectSemantics.pdf)
> >
> > regards,
> > Michiharu Kudo
> > Internet Technology              TEL +81-46-215-4642
> > Tokyo Research Laboratory    FAX +81-46-273-7428
> > IBM Japan Ltd.                      Internet: kudo@jp.ibm.com
> > ---------------------- Forwarded by Michiharu Kudoh/Japan/IBM on
> 2001/10/22
> > 20:28 ---------------------------
> >
> > From: Michiharu Kudoh on 2001/10/15 20:03
> >
> > To:   "'xacml@lists.oasis-open.org'" <xacml@lists.oasis-open.org>
> @internet
> > cc:
> >
> > From: Michiharu Kudoh/Japan/IBM@IBMJP
> > Subject:  [xacml] [policy model]: Subject semantics proposal
> >
> > I post a proposal of subject semantics.
> >
> > >Action Items:
> > >2. Submit subject semantics proposals.
> >
> > regards,
> > Michiharu Kudo
> > Internet Technology              TEL +81-46-215-4642
> > Tokyo Research Laboratory    FAX +81-46-273-7428
> > IBM Japan Ltd.                      Internet: kudo@jp.ibm.com
> > *******Attachment(s) have been removed*******
> >
> >
> ------------------------------------------------------------------------
> >                                       Name: XACMLObjectSemantics.pdf
> >    XACMLObjectSemantics.pdf           Type: Portable Document Format
> (application/pdf)
> >                                   Encoding: BASE64
> >                            Download Status: Not downloaded with message


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