<p><a name="ActiveSesame::Ontology::Term"></a></p> <h2>Ontology::Term</h2> <p>The ActiveSesame::Ontology::Term is an object relational mapping for ontology terms. Given an ontology term it will query the triple store to find all relationships of that term.</p> <h3>Relationships</h3> <p>When an ontology term is instantiated it runs a sparql statement to find all relationships and terms related to the given term. It stores the results in a relationship map which can be accessed by the relationship_map method. All methods called on the term try to find the method name in the relationship map and return an ontology term built on the related term. Man that&#8217;s confusing without seeing it&#8230;</p> <pre> term = ActiveSesame::Ontology::Term.new("http://fakeontology.org/ontology#myTerm") # Runs a sparql query to find all relationships related to this term on the default repository term.relationships # returns a list of all the relationships found by the sparql query term.relationship_map # returns a hash of where the key is the relationship and the value is the related ontology term term.relation1 # returns an ontology term built on the value of the relation1 in the relationship_map </pre> <h3>Memoization</h3> <p>The sparql query is run on initialization and memoized until the reset method is called. When chaining methods relationship calls are memoized as well.</p> <pre> term.relationships #Does not rerun the sparql term.relation1 #Get the term referred to in this relationship term.relation1.relation2 #Get the term referred to by "relation2" on the term referred to by relation1 on term term.relation1.relation3 # This does not rerun the sparql for term or relation1 term.reset # Resets all memoization </pre> <h3>Creating Triples</h3> <p>place holder</p> 2009-11-27T00:45:09-08:00 263248 ontology 11798 2009-11-02T04:54:06-08:00 8178