粗野
发表于 2025-3-23 12:39:49
Semantics in Databases,e. In computer linguistics or web research, semantics is a component of the language which associates words or components of a grammar with their meaning (linguistic content). In modeling and specification, semantics assigns set-theoretic denotations to formulas in order to characterize truth. At th
演讲
发表于 2025-3-23 14:20:16
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HUMID
发表于 2025-3-23 20:30:31
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弄皱
发表于 2025-3-23 23:14:33
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Pedagogy
发表于 2025-3-24 05:32:09
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SLAG
发表于 2025-3-24 09:38:15
Characterization of Type Hierarchies with Open Specification,ork, such incomplete hierarchies are viewed as .; that is, descriptions which are sets of constraints. The actual hierarchy is then any structure satisfying these constraints. For such specifications, two forms of characterization are provided. The first is algebraic and utilizes a generalization of
organic-matrix
发表于 2025-3-24 12:06:24
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accessory
发表于 2025-3-24 18:28:09
Consistency Enforcement in Databases,grity constraints. This modification may be done at compile-time or at run-time. The commonly known run-time approach uses rule triggering systems (RTSs). It has been shown that these systems cannot solve the problem in general..As an alternative . (GCSs) have been studied. This approach requires th
肿块
发表于 2025-3-24 20:42:59
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指耕作
发表于 2025-3-25 00:40:29
Cardinality Constraints in Disjunctive Deductive Databases,y”, “at most”, or “at least”, respectively, . elements out of the set M have to be chosen..We show how a set . of constraints can be represented by means of a positive-disjunctive deductive database . ., such that the models of . . correspond to the solutions of .. This allows for embedding cardinal