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These are the standard attributes that are supplied by the Fedora XACML AuthZ Delegate. As a point of reference, here are the standard fedora attributes from the FeSL implementation of XACML.

Subject Attributes

IDDataTypeSourceIn Request?Notes
urn:oasis:names:tc:xacml:1.0:subject:subject-idstringuser principalYes 
urn:oasis:names:tc:xacml:1.0:subject:subject-id-qualifierstringTBD name-space for the subject-id
urn:oasis:names:tc:xacml:1.0:subject:request-time AuthZ delegateYestime when this action was requested
urn:oasis:names:tc:xacml:1.0:subject:session-start-time ModeShape sessionYestime when Fedora transaction began
urn:oasis:names:tc:xacml:2.0:subject:groupstringall principals except userYesextensible via Principal Factory
fcrepo-xacml:subject-rolestringeffective access rolesYes

Fedora access roles for this user/group†

XACML Role-Based Access Control Profile

urn:oasis:names:tc:xacml:1.0:subject:authn-locality:authentication-methodstringTBDYeswhat style of AuthN? (OAuth/Tomcat/Shibboleth)
urn:oasis:names:tc:xacml:1.0:subject:authn-locality:ip-addressstringTBDYesaddress of authenticating agent:
urn:oasis:names:tc:xacml:1.0:subject:authn-locality:dns-namestringTBDYesSee above description of ip-address.

† Hydra rights metadata may be dynamically crosswalked to Fedora roles via a sequencer.

Action Attributes

IDData TypeSourceIn Request?Notes
urn:oasis:names:tc:xacml:1.0:action:action-idstringModeShape actionYesSee ModeShapePermissions list
urn:oasis:names:tc:xacml:1.0:action:action-namespacestringpresetYesA TBD namespace referring to modeshape actions.

Resource Attributes

Question: What kind of URI shall we use for pointing at resources in Fedora/ModeShape policies? This decision will mostly be of concern to ResourceAttributeFinders, since policies will not usually refer to individual resource IDs directly.

IDData TypeSourceIn Request?Notes
urn:oasis:names:tc:xacml:1.0:resource:resource-idstringFedora pathYesThe full Fedora path to the resource or propery (with extra hierarchy compressed away)


URIFedora URIYesFedora graph subject URI for this resource
urn:oasis:names:tc:xacml:2.0:resource:resource-ancestor-or-selfstringFedora pathYesSet of paths for this resource and its ancestors
fcrepo-xacml:resource-parentstringFedora pathYesPath of the parent of the resource (always an existing resource, in session if not saved to workspace)
urn:oasis:names:tc:xacml:2.0:resource:resource-ancestorstringFedora pathYesSet of paths of all ancestor resources
fcrepo-xacml:resource-workspacestringModeShape sessionYesName of the workspace
urn:oasis:names:tc:xacml:1.0:resource:scopestringAuthZ DelegateYes

If the action impacts child resources, then value will be "Descendants", otherwise it will be "Immediate".

A "remove" is an example of such an action.‡

‡ Further research is needed to figure out the semantics of a ModeShape move operation and how policies shall be enforced.

RDF Predicates as Dynamic Resource Attributes

There are many RDF predicates that are available in the graph for Fedora resources. These include numerous properties like mime-type, binary size, and even checksum. Without trying to predict which of these will be useful in policies, Fedora XACML can reference any predicate URI as a resource attribute ID.

Here are some examples of these resource attributes:

IDData TypeSourceIn Request?Notes
http://www.w3.org/1999/02/22-rdf-syntax-ns#typeURIModeShape property (via RDF property)NoPrimary Types and mixin types defined in CNDs will be returned in this attribute


Environment Attributes

IDData TypeSourceIn Request?Notes
urn:oasis:names:tc:xacml:1.0:environment:current-timetimeAuthZ DelegateYes 
urn:oasis:names:tc:xacml:1.0:environment:current-datedateAuthZ DelegateYes 
urn:oasis:names:tc:xacml:1.0:environment:current-dateTimedateTimeAuthZ DelegateYes 
urn:fedora:xacml:2.0:environment:original-ip-addressstringrequest IP or headerYesthe IP of the original client (may be forwarded by a proxy application
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