664 search results - page 71 / 133 » Answering order-based queries over XML data |
KR
2010
Springer
15 years 2 months ago
2010
Springer
Ontologies can be used to provide an enriched vocabulary for the formulation of queries over instance data. We identify query emptiness and predicate emptiness as two central reas...
215
click to vote
ICDE
2003
IEEE
15 years 11 months ago
2003
IEEE
This paper presents SPEX, a streamed and progressive evaluation of regular path expressions with XPath-like qualifiers against XML streams. SPEX proceeds as follows. An expression...
SIGMOD
2002
ACM
15 years 10 months ago
2002
ACM
Relational query optimizers have traditionally relied upon table cardinalities when estimating the cost of the query plans they consider. While this approach has been and continue...
ICCS
2005
Springer
15 years 3 months ago
2005
Springer
We have previously described a hybrid keyword search that combines metadata search with a traditional keyword search over unstructured context data. This hybrid search paradigm pro...
109
click to vote
AAAI
2007
15 years 11 days ago
2007
Efficient query answering over ontologies is one of the most useful and important services to support Semantic Web applications. Approximation has been identified as a potential...