1238 search results - page 26 / 248 » View-based query containment |
99
Voted
DLOG
2008
14 years 12 months ago
2008
Answering queries posed over knowledge bases is a central problem in knowledge representation and database theory. In databases, query containment is one of the important query op...
DKE
2006
14 years 9 months ago
2006
Existing encoding schemes and index structures proposed for XML query processing primarily target the containment relationship, specifically the parent
IS
2007
14 years 9 months ago
2007
Preference queries are relational algebra or SQL queries that contain occurrences of the winnow operator (find the most preferred tuples in a given relation). Such queries are pa...
VLDB
2005
ACM
15 years 3 months ago
2005
ACM
In this demonstration, we describe a system for storing and querying faceted hierarchies. We have developed a general faceted domain model and a query language for hierarchically ...
ECIR
2007
Springer
14 years 11 months ago
2007
Springer
Question answering systems rely on retrieval components to identify documents that contain an answer to a user’s question. The formulation of queries that are used for retrieving...