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Subject: RE: [xacml-users] AttributeSelector usage
You are perfectly able to process it in any way you like. Standard does not restrict what you put into a context. We could not generalize the AttributeSelector, because it job is to select atomic values, not complex data structures. It would not be possible to define strict typing for arguments otherwise. You can access anything using an AttributeDesignator, from a context populated with your custom datatypes, or a function that returns your custom datatype and takes path to it as its argument, if you need to make selection as part of the policy. Such function would be responsible for the type safety then. There is nothing wrong or counter intuitive with the standard I think and I does not prevent your use case at all. Daniel; -----Original Message----- From: Prakash Yamuna [mailto:techpy@gmail.com] Sent: Wednesday, March 09, 2005 12:10 PM To: Daniel Engovatov Cc: xacml-users@lists.oasis-open.org Subject: Re: [xacml-users] AttributeSelector usage I have my own functions and datatypes - hence I find it counter intutive. I do agree that a standard mechanism (functions, etc) cannot fathom an arbitrary structure in an attributevalue - but I would have thought that if I define my own functions and own datatypes then I should be able to process it - even with a standard implementation. prakash On Wed, 9 Mar 2005 09:50:57 -0800, Daniel Engovatov <dengovatov@bea.com> wrote: > > >This seems counter intutive to me in that the schema is open enough to > >allow embedding my own structure into the AttributeValue but I cannot > >leverage it in a meaningful manner in the AttributeSelector. > > Why counter intuitive? You can only use context data as an argument > for a function used within the condition. XACML standard functions do > not use any custom data types that you may import from your schema or > from other applications, so you can not use them in a standard XACML > expression. > > Daniel; > >
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