Triglyceride
发表于 2025-3-25 06:38:46
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Coronation
发表于 2025-3-25 09:31:02
On the expressiveness of first-order constraint languages,stronger in that we prove that it is not expressible in any higher order logic either. Furthermore, we show that the same query can be expressed in . by giving a non-trivial sentence that characterizes the class of databases consisting of exactly one line.
Expiration
发表于 2025-3-25 14:41:51
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宽大
发表于 2025-3-25 18:07:27
Towards the definition of a spatial object-oriented data model with constraints,r basic model is quite similar to the Brodsky and Kornatzky‘s model but, by the introduction of the notion of a ., the modelling of part-subpart relationships is greatly simplified. In fact, we are even able to express “what-if” queries (for example: “Where can I put a desk in the room?”) quite naturally.
endure
发表于 2025-3-25 21:53:40
Ulrich Beck’s Scientific Leadership Profiletions. We then analyze the issues concerning spatial data modeling in the proposed constraint data model and the application of the proposed language to model spatial queries. Indeed, constraint databases offer a powerful formalism to express sets of points embedded in .-dimensional spaces.
CREEK
发表于 2025-3-26 03:20:03
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Absenteeism
发表于 2025-3-26 06:52:27
Conference proceedings 1996chshafen, Germany in September 1995..The 10 full revised papers selected for inclusion in this volume are written by and for practitioners, researchers, and application users of core constraint database technology; they can be classified in three sections on expressiveness of the various constraint
grenade
发表于 2025-3-26 10:11:01
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言外之意
发表于 2025-3-26 12:43:42
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cartilage
发表于 2025-3-26 18:59:36
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