383 search results - page 29 / 77 » Query Containment for Conjunctive Queries with Regular Expre... |
105
click to vote
ADC
2007
Springer
15 years 6 months ago
2007
Springer
Structured Query Language (SQL) is the dominant language for querying relational databases today, and is an essential topic in introductory database courses in higher education. E...
137
click to vote
DLOG
2011
14 years 3 months ago
2011
W3C currently extends the SPARQL query language with so-called entailment regimes, which define how queries are evaluated using logical entailment relations. We describe a sound a...
155
click to vote
EDBT
2008
ACM
15 years 12 months ago
2008
ACM
Data exchange is the problem of transforming data structured under a schema (called source) into data structured under a different schema (called target). The emphasis of data exc...
SAC
2008
ACM
14 years 11 months ago
2008
ACM
We address aggregate queries over GIS data and moving object data, where non-spatial information is stored in a data warehouse. We propose a formal data model and query language t...
127
click to vote
SEBD
2001
15 years 1 months ago
2001
This paper introduces a new logical formalism, intended for temporal conceptual modelling, as a natural combination of the well-known description logic DLR and point-based linear ...