Topics and Subtopics Topic rdf type has Subtopic

Topics and Subtopics : Topic rdf: type : has. Subtopic : Semantic. Web : has. Subtopic : Jena : is. Subtopic. Of : Jena RDF API : is. Subtopic. Of and : has. Subtopic are inverses of each other and they are also transitive relations. 1

Knowledge Requirements Is RDF a subtopic of the Jena RDF API? That sounds a bit… But knowing RDF is a knowledge requirement for learning the Jena RDF API. : is. Knowledge. Requirement. To : URI : is. Knowledge. Requirement. To : RDF : has. Knowledge. Requirement : Jena RDF API : has. Knowledge. Requirement : is. Knowledge. Requirement. To and : has. Knowledge. Requirement are inverses of each other and they seem to be transitive relations. 2

Subtle Matters… (do they have consequences for part 2 and 3…) : T 1 : has. Subtopic : has. Knowledge. Requirement : has. Subtopic : T 1_ST 1 : T 2 : T 1_ST 3 : has. Subtopic : T 2_ST 1 : T 2_ST 2 But this does not imply (etc. ): : T 1 : has. Subtopic : has. Knowledge. Requirement : has. Subtopic : T 1_ST 1 : T 2 : T 1_ST 3 : has. Knowledge. Requirement : T 2_ST 1 : has. Subtopic : T 2_ST 2

: T 1 : has. Subtopic : has. Knowledge. Requirement : has. Subtopic : T 1_ST 1 : T 2 : T 1_ST 3 : T 2_ST 1 : has. Subtopic : T 2_ST 2 Does it imply that there is at least one : has. Knowledge. Requirement from a subtopic of T 2 to a subtopic of T 1?

: T 2 : T 1 : has. Subtopic : T 1_ST 1 : T 1_ST 2 : T 1_ST 3 : has. Knowledge. Requirement : has. Subtopic : T 2_ST 1 : T 2_ST 2 The situation above seems to imply: : T 1 : has. Subtopic : has. Knowledge. Requirement : has. Subtopic : T 1_ST 1 : T 2 : T 1_ST 3 : has. Knowledge. Requirement : T 2_ST 1 : has. Subtopic : T 2_ST 2

More Advanced Knowledge Requirement Modelling • You may something about the importance of a subtopic in relation to a topic. • You can make it possible to specify alternative subtopics… • You could make it more advanced by introducing perspectives. E. g. , what topics are of interest seen from the perspective of a Java programmer or seen from the perspective of a CEO of an Internet company, etc. . 6