6597 search results - page 61 / 1320 » Orderings and Types in Databases |
ICDT
2001
ACM
14 years 1 months ago
2001
ACM
XML data is often used (validated, stored, queried, etc) with respect to di erent types. Understanding the relationship between these types can provide important information for ma...
PODS
1999
ACM
14 years 1 months ago
1999
ACM
We give a polymorphic account of the relational algebra. We introduce a formalism of \type formulas" speci cally tuned for relational algebra expressions, and present an algo...
DBPL
2007
Springer
14 years 28 days ago
2007
Springer
Inclusion between XML types is important but expensive, and is much more expensive when unordered types are considered. We prove here that inclusion for XML types with interleavin...
XIMEP
2004
ACM
14 years 2 months ago
2004
ACM
We argue that efficient support for schema validation and type annotation in XQuery processors deserves as much attention as efficient evaluation techniques for XPath queries have...
SIGMOD
2003
ACM
14 years 9 months ago
2003
ACM
In this paper we propose an approach that enables mobile clients to determine the validity of previous queries based on their current locations. In order to make this possible, th...