383 search results - page 54 / 77 » Query Containment for Conjunctive Queries with Regular Expre... |
JASIS
2008
13 years 8 months ago
2008
Research on cross-language information retrieval (CLIR) has typically been restricted to settings using binary relevance assessments. In this paper, we present evaluation results f...
ICALP
2000
Springer
14 years 7 days ago
2000
Springer
Abstract. Tree-walking automata (TWAs) recently received new attention in the fields of formal languages and databases. Towards a better understanding of their expressiveness, we c...
ICDE
2005
IEEE
14 years 2 months ago
2005
IEEE
Queries on XML documents typically combine selections on element contents, and, via path expressions, the structural relationships between tagged elements. Efficient support for ...
STOC
2003
ACM
14 years 9 months ago
2003
ACM
Let H be a fixed directed graph on h vertices, let G be a directed graph on n vertices and suppose that at least n2 edges have to be deleted from it to make it H-free. We show tha...
ECIR
2007
Springer
13 years 10 months ago
2007
Springer
Abstract. In focussed XML retrieval, a retrieval unit is an XML element that not only contains information relevant to a user query, but also is specific to the query. INEX defin...