342 search results - page 55 / 69 » Conjunctive Queries over Trees |
SIGMOD
2004
ACM
14 years 1 months ago
2004
ACM
An increasing number of data sources now become available on the Web, but often their contents are only accessible through query interfaces. For a domain of interest, there often ...
ICDT
2009
ACM
14 years 8 months ago
2009
ACM
Marx and de Rijke have shown that the navigational core of the w3c XML query language XPath is not first-order complete ? that is it cannot express every query definable in firsto...
ICDM
2007
IEEE
14 years 2 months ago
2007
IEEE
Data mining algorithms use various Trie and bitmap-based representations to optimize the support (i.e., frequency) counting performance. In this paper, we compare the memory requi...
ML
1998
ACM
13 years 7 months ago
1998
ACM
It is well known that prior knowledge or bias can speed up learning, at least in theory. It has proved di cult to make constructive use of prior knowledge, so that approximately c...
SIGMOD
2007
ACM
14 years 8 months ago
2007
ACM
Database queries are often exploratory and users often find their queries return too many answers, many of them irrelevant. Existing work either categorizes or ranks the results t...