383 search results - page 19 / 77 » Query Containment for Conjunctive Queries with Regular Expre... |
AINA
2007
IEEE
14 years 2 months ago
2007
IEEE
Regular path queries (RPQs), expressed as regular expressions over the alphabet of database edge-labels, are commonly used for guided navigation of graph databases. While convenie...
PODS
2009
ACM
14 years 9 months ago
2009
ACM
The paper investigates the question of whether a partially closed database has complete information to answer a query. In practice an enterprise often maintains master data Dm, a ...
ICDE
2003
IEEE
14 years 10 months ago
2003
IEEE
This paper presents SPEX, a streamed and progressive evaluation of regular path expressions with XPath-like qualifiers against XML streams. SPEX proceeds as follows. An expression...
NJC
2006
13 years 8 months ago
2006
Regular tree queries (RTQs) are a class of queries considered especially relevant for the expressiveness and evaluation of XML query languages. The algorithms proposed so far for ...
XSYM
2005
Springer
14 years 2 months ago
2005
Springer
Among various proposals for primitives for deconstructing XML data two approaches seem to clearly stem from practise: path expressions, widely adopted by the database community, an...