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Here is a recent translation of the Fedora Rels Ext ontology in n3 for discussion purposes
Namespaces
These are the namespace/prefix mappiings utilized int he examples below
@prefix r: <http://www.w3.org/1999/02/22-rdf-syntax-ns#
>.
@prefix s: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix rels: <info:fedora/fedora-system:def/relations-external#>.
Abstract Fedora Relationship
The primitive property for all object-to-object relationships in the fedora ontology
<rels:fedoraRelationship>
a r:Property.
<b>Comments:</b>
- This can be classified as similar to a UML Association (representing some sort of relationship between two objects) --Mark Diggory 16:59, 1 October 2008 (EDT)
Abstract Parts
<b>Is Part Of</b>
A definition of the generic part/whole relationship between fedora objects. The subject is a fedora object representing a part and the predicate is a fedora object representing a whole.
<rels:isPartOf>
a r:Property;
s:subPropertyOf
<rels:fedoraRelationship>.
<b>Has Part</b>
A definition of the generic part/whole relationship between fedora objects. The subject is a fedora object representing a whole and the predicate is a fedora object representing a part.
<rels:hasPart>
a r:Property;
s:subPropertyOf
<rels:fedoraRelationship>.
<b>Comments:</b>
- Parts represent Composition Associations from UML, Compositions reflect a "whole/part" relationship. --Mark Diggory 17:02, 1 October 2008 (EDT)
- _ I have questions how this relates to http://dublincore.org/documents/dcmi-terms/#terms-isPartOf I believe theres should be some documentation around this otherwise, these should just be refinements of "isPart"._ --Mark Diggory 17:19, 1 October 2008 (EDT)
Constituents
<b>Is Constituent Of</b>
This is a refinement of the generic part/whole relationship in the "made of" sense with referential integrity implications. The subject is a fedora object representing a constituent part and the predicate is a fedora object representing a whole of which the subject is a constituent. The constituent part cannot stand alone in any meaningful way without reference to the whole.
<rels:isConstituentOf>
a r:Property;
s:subPropertyOf
<rels:isPartOf>.
<b>Has Constituent</b>
This is a refinement of the generic part/whole relationship in the "made of" sense with referential integrity implications. The subject is a fedora object representing a whole that is made of constituent parts and the predicate is a fedora object representing one of the constituent parts. The whole loses its integrity if the constituent part is removed.
<rels:hasConstituent>
a r:Property;
s:subPropertyOf
<rels:hasPart>.
<b>Comments:</b>
- This is a further refinement a Composition Association, forcing referential integrity to be maintained, I'm not 100% convinced its neccessary but may have a usefulness if the system is allowing Compositions that do not require addressablitiy. --Mark Diggory 17:24, 1 October 2008 (EDT)
Members
<b>Is Member Of</b>
This is a refinement of the generic part/whole relationship that defines a set membership relationship between fedora objects. The subject is a fedora object representing a member of a set and the predicate is a fedora object representing a whole set of which the subject is a member. The member can be separated from the set and still stand alone as an object in its own right.
<rels:isMemberOf>
a r:Property;
s:subPropertyOf
<rels:isPartOf>.
<b>Has Member</b>
This is a refinement of the generic part/whole relationship that defines a set membership relationship between fedora objects. The subject is a fedora object representing a whole set and the predicate is a fedora object representing a member in the set. The set does not lose its integrity if a member is removed from the set.
<rels:hasMember>
a r:Property;
s:subPropertyOf
<rels:hasPart/>.
<b>Comments:</b>
- I'm not convinced this is very different at all from a "hasPart" because "Constitutent" could just be considered a restriction on Membership. --Mark Diggory 17:26, 1 October 2008 (EDT)
Subsets
<b>Is Subset Of</b>
This is a refinement of the generic set membership relationship to indicate the notion of a subset. The subject is a fedora object that represents a subset and the predicate is a fedora object that represents the set of which the subject is a subset.
<rels:isSubsetOf>
a r:Property;
s:subPropertyOf
<rels:isMemberOf>.
<b>Has Subset</b>
This is a refinement of the generic set membership to indicate the notion of a subset. The subject is a fedora object that represents a set of objects and the predicate is a fedora object that represents a subset of the subject set.
<rels:hasSubset>
a r:Property;
s:subPropertyOf
<rels:hasMember>.
<b>Commnets:</b>
- I wonder about this one as well, because RDF is an open model, unless stated otherwise, almost any relation may be expressed by another agnet/authority to the point that there may be additional assertions of inclusion into any such Collection. --Mark Diggory 17:29, 1 October 2008 (EDT)
Collections
<b>Is Member of Collection</b>
This is a refinement of the generic membership relationship to indicate the notion of a digital collection. The subject is a fedora object representing an item in a digital collection and the predicate is a fedora object representing a whole digital collection.
<rels:isMemberOfCollection>
a r:Property;
s:subPropertyOf
<rels:isMemberOf>.
<b>Has Collection Member</b>
This is a refinement of the generic membership to indicate the notion of a digital collection. The subject is a fedora object representing a whole digital collection and the predicate is a fedora object representing an item that is a member of the digital collection.
<rels:hasCollectionMember>
a r:Property;
s:subPropertyOf
<rels:hasMember>.
Derivations
<b>Is Derivation Of</b>
A definition of a generic derivation relationship between fedora objects. The subject is a fedora object that represents a derivation of the predicate which is another fedora object.
<rels:isDerivationOf>
a r:Property;
s:subPropertyOf
<rels:fedoraRelationship>.
<b>Has Derivation</b>
A definition of a generic derivation relationship between fedora objects. The subject is a fedora object and the predicate is a fedora object that represents a derivation of the subject.
<rels:hasDerivation>
a r:Property;
s:subPropertyOf
<rels:fedoraRelationship>.
Dependencies
<b>Is Dependent Of</b>
A definition of a generic dependency relationship between fedora objects. The subject is a fedora object that represents a dependent and the predicate is another fedora object that is depended upon by the subject.
<rels:isDependentOf>
a r:Property;
s:subPropertyOf
<rels:fedoraRelationship>.
<b>Has Dependent</b>
A definition of a generic dependency relationship between fedora objects. The subject is a fedora object that is depended upon and the predicate is a fedora object that represents a dependent of the subject.
<rels:hasDependent>
a r:Property;
s:subPropertyOf
<rels:fedoraRelationship>.
Descriptions
<b>Is Description Of</b>
A generic descriptive relationship between fedora objects. The subject is a fedora object that represents a descriptive entity and the predicate is a fedora object that is being described in some manner by the subject.
<rels:isDescriptionOf>
a r:Property;
s:subPropertyOf
<rels:fedoraRelationship>.
<b>Has Description</b>
A generic descriptive relationship between fedora objects. The subject is a fedora object that is being described in some manner and the predicate is a fedora object that represents a descriptive entity that is about the subject.
<rels:HasDescription>
a r:Property;
s:subPropertyOf
<rels:fedoraRelationship>.
Metadata
<b>Is MetadataFor</b>
A refinement of the generic descriptive relationship indicating a metadata relationship between fedora objects. The subject is a fedora object that represents metadata and the predicate is a fedora object for which the subject serves as metadata.
<rels:isMetadataFor>
a r:Property;
s:subPropertyOf
<rels:isDescriptionOf>.
<b>Has Metadata</b>
A refinement of the generic descriptive relationship indicating a metadata relationship between fedora objects. The subject is a fedora object and the predicate is a fedora object that represents metadata about the subject.
<rels:HasMetadata>
a r:Property;
s:subPropertyOf
<rels:hasDescription>.
Annotations
<b>Is Annotation Of</b>
A refinement of the generic descriptive relationship indicating a commentary relationship between fedora objects. The subject is a fedora object that represents an annotation or comment and the predicate is a fedora object that is being commented upon by the subject.
<rels:isAnnotationOf>
a r:Property;
s:subPropertyOf
<rels:isDescriptionOf>.
<b>Has Annotation</b>
A refinement of the generic descriptive relationship indicating a commentary relationship between fedora objects. The subject is a fedora object that is being commented on and the predicate is a fedora object that represents an annotation or comment about the subject.
<rels:HasAnnotation>
a r:Property;
s:subPropertyOf
<rels:hasDescription>.
Equivalencies
<b>Has Equivalent</b>
A definition of a generic equivalence relationship between fedora objects. The subject is a fedora object that is equivalent to the predicate which is another fedora objects.
<rels:hasEquivalent>
a r:Property;
s:subPropertyOf
<rels:fedoraRelationship>.
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