Bridging the Gap between Flexibility and Rigidity:Unifying Relationships with a Hybrid Link Architecture

摘要

Current knowledge systems lack an effective architecture to bridge the well-acknowledged gap between flexibility andrigidity - users’ preference of flexible expression and machine’s need for rigorous representation. This paper focuses onfinding an adequate set of relationship types (or link types) and map flexible expressions from users to link types inpropositional knowledge systems, in which knowledge elements are stored as “concept-relationship-concept” triplets. We callour approach “hybrid link architecture”. This architecture has two levels of presentations, an open link name layer and aclosed link type layer. Between these two layers is a matching mechanism based on a psycholinguistic thesaurus to mapnames to types. The link types are derived by synthesizing literature of knowledge organization, semantic network, andeducational taxonomies. A two-stage evaluation is conducted based on 39,706 triplets. The evaluation shows that thematching mechanism is accurate and the proposed link types are mutually exclusive and cover most link names in ourdataset.