7607 search results - page 48 / 1522 » Querying data provenance |
ICDT
2009
ACM
14 years 10 months ago
2009
ACM
The class of unions of conjunctive queries (UCQ) has been shown to be particularly well-behaved for data exchange; its certain answers can be computed in polynomial time (in terms...
DEXAW
2004
IEEE
14 years 1 months ago
2004
IEEE
Database-like query processing over a network of sensors has become an attractive paradigm for building sensor applications. A sensor query is characterized by data streams among ...
CCGRID
2007
IEEE
14 years 4 months ago
2007
IEEE
Data Grids provide transparent access to heterogeneous and autonomous data resources. The main contribution of this paper is the presentation of a data sharing system that (i) is ...
PODS
2006
ACM
14 years 9 months ago
2006
ACM
This is a survey of algorithms, complexity results, and general solution techniques for efficiently processing queries on tree-structured data. I focus on query languages that com...
PVLDB
2010
13 years 8 months ago
2010
XMorph is a new, shape polymorphic, domain-specific XML query language. A query in a shape polymorphic language adapts to the shape of the input, freeing the user from having to k...