title: Temporal propositions in a HIS-oriented expert system shell.
abstract: This paper describes one of the most important aspects in our recent research on building a HIS-oriented expert system shell: representation and processing of temporal propositions about time-series. With respect to time attribute, medical objects have been classified into three categories: time-independent objects, pointwise time-dependent objects and durationwise time-dependent objects. Temporal propositions can be applied only to time-dependent objects. Through implementation of fuzzy relational operators and their uses, the representation and processing of such propositions become more reasonable and more natural.
authors.affiliation: Institute of Medical Informatics, University Giessen, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Qiu
authors.forename: J
authors.initials: J
authors.lastname: Dudeck
mesh_terms: D000465:Algorithms; D005103:Expert Systems; D012660:Semantics; D012984:Software; D013997:Time Factors; D014584:User-Computer Interface