1268 search results - page 198 / 254 » On database query languages for K-relations |
SAC
2006
ACM
14 years 2 months ago
2006
ACM
In the paper we describe the problem of grouping and aggregation in the concept-oriented data model. The model is based on ordering its elements within a hierarchical multidimensi...
DAWAK
2005
Springer
14 years 2 months ago
2005
Springer
In heterogeneous data warehousing environments, autonomous data sources are integrated into a materialized integrated database. The schemas of the data sources and the integrated ...
ICDT
2005
ACM
14 years 2 months ago
2005
ACM
We give two sufficient conditions on XPath like languages for having first order expressivity, meaning that every first order definable set of paths in an ordered node-labeled t...
FOCS
2003
IEEE
14 years 2 months ago
2003
IEEE
We give a complexity theoretic classification of homomorphism problems for graphs and, more generally, relational structures obtained by restricting the left hand side structure ...
DEXAW
2004
IEEE
14 years 19 days ago
2004
IEEE
Web documents present new challenges to conventional Information Retrieval (IR) technologies. This paper describes how these challenges are faced in FameIR, a multilingual multime...