Major classes and relationships in the model. A Claim is the main Statement argued by a Micropublication. A Statement is a truth-bearing Sentence, which may be variously qualifiedBy some Qualifier. A Sentence is a well-formed sequence of symbols, intended to convey meaning; and is not necessarily either complete or truth-bearing. A Micropublication hasElements consisting of those Representations it asserts or quotes. A Representation supports or challenges other Representations. The supporting Representations which are elementOf the Micropublication will be in its SupportGraph; challenging elements, will be in its ChallengeGraph. Dashed-line boundaries indicate graphs instantiated by query.