19 search results - page 3 / 4 » Consistent query answering under primary keys: a characteriz... |
ICDT
2010
ACM
13 years 10 months ago
2010
ACM
In XML data exchange, a schema mapping specifies rules for restructuring a source document under the target schema, and queries over the target document must be answered in a way...
SDMW
2007
Springer
13 years 11 months ago
2007
Springer
Abstract. We investigate the experimental effectiveness of query rewriting over XML security views. Our model consists of access control policies specified over DTDs with XPath e...
CIKM
2011
Springer
12 years 5 months ago
2011
Springer
We consider data exchange for XML documents: given source and target schemas, a mapping between them, and a document conforming to the source schema, construct a target document a...
DEXAW
2005
IEEE
13 years 11 months ago
2005
IEEE
For several reasons a database may not satisfy certain integrity constraints (ICs). However, most likely most of the information in it is still consistent with the ICs; and could ...
AAAI
2008
13 years 7 months ago
2008
We introduce in this paper two new, complete propositional languages and study their properties in terms of (1) their support for polytime operations and (2) their ability to repr...