142 search results - page 22 / 29 » On Conjunctive Query Answering in EL |
SIGMOD
2009
ACM
14 years 10 months ago
2009
ACM
Enabling keyword queries over relational databases (KQDB) benefits a large population of users who have difficulty in understanding the database schema or using SQLs. However, sin...
CORR
2007
Springer
13 years 9 months ago
2007
Springer
We address the problem of answering Web ontology queries efficiently. An ontology is formalized as a Deductive Ontology Base (DOB), a deductive database that comprises the ontology...
SIGMOD
2011
ACM
13 years 19 days ago
2011
ACM
In this paper we consider the problem of answering queries using views, which is important for data integration, query optimization, and data warehouses. We consider its simplest ...
SEMWEB
2009
Springer
14 years 4 months ago
2009
Springer
An important issue for the Semantic Web is how to combine open-world ontology languages with closed-world (non-monotonic) rule paradigms. Several proposals for hybrid languages all...
AUSAI
2008
Springer
13 years 12 months ago
2008
Springer
This paper introduces the controlled natural language PENG Light together with a language processor that is based on a bidirectional grammar. The language processor has the followi...