5130 search results - page 352 / 1026 » Constraint Query Languages |
186
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UAI
2003
15 years 8 months ago
2003
Abstract. In Datalog, missing values are represented by Skolem constants. More generally, in logic programming missing values, or existentially quantified variables, are represent...
188
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ACL
2010
15 years 4 months ago
2010
For languages with (semi-) free word order (such as German), labelling grammatical functions on top of phrase-structural constituent analyses is crucial for making them interpreta...
184
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DATESO
2007
15 years 8 months ago
2007
We address a problem of updating XML documents having their XML schema described by a Document Type Definition (DTD) without breaking their validity. We present a way how to expre...
171
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PODS
2006
ACM
16 years 6 months ago
2006
ACM
Query containment is a fundamental algorithmic problem in database query processing and optimization. Under set semantics, the query-containment problem for conjunctive queries ha...
152
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ER
2004
Springer
16 years 2 days ago
2004
Springer
This paper uses a knowledge-based approach to querying heterogeneous spatial databases based on an ontology and conceptual and attribute similarities. The ontology, which may be in...