239 search results - page 21 / 48 » Complete Geometrical Query Languages |
PODS
2006
ACM
14 years 8 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...
ICSEA
2006
IEEE
14 years 2 months ago
2006
IEEE
—The XML language is becoming the preferred means of data interchange and representation in web based applications. Usually, XML data is stored in XML repositories, which can be ...
DKE
2007
13 years 8 months ago
2007
XPath is the standard language for addressing parts of an XML document. We present a sound and complete decision procedure for containment of XPath queries. The considered XPath f...
WWW
2008
ACM
14 years 9 months ago
2008
ACM
The Semantic Web is based on accessing and reusing RDF data from many different sources, which one may assign different levels of authority and credibility. Existing Semantic Web ...
DLOG
2011
12 years 12 months ago
2011
In this paper we present a formal framework and tool supporting the user in the task of formulating a precise query – which best captures their information needs – even in the ...