239 search results - page 24 / 48 » Complete Geometrical Query Languages |
TREC
1994
13 years 8 months ago
1994
The Smart information retrieval project emphasizes completely automatic approaches to the understanding and retrieval of large quantities of text. We continue our work in TREC 3, ...
PVLDB
2008
13 years 6 months ago
2008
This paper studies, for the first time, the management of type information for an important class of semi-structured data: nested DAGs (Directed Acyclic Graphs) that describe exec...
DBPL
2001
Springer
13 years 12 months ago
2001
Springer
Abstract. We are interested in the theoretical foundations of the optimization of conjunctive regular path queries (CRPQs). The basic problem here is deciding query containment bot...
SSD
1993
Springer
13 years 11 months ago
1993
Springer
Topological relationships between spatial objects represent important knowledge that users of geographic information systems expect to retrieve from a spatial database. A di cult t...
FOCS
1998
IEEE
13 years 11 months ago
1998
IEEE
This paper deals with the evaluation of acyclic Boolean conjunctive queries in relational databases. By well-known results of Yannakakis [1981], this problem is solvable in polynom...