958 search results - page 141 / 192 » Efficient data structures for range-aggregate queries on tre... |
100
click to vote
JACM
2008
14 years 10 months ago
2008
XML queries are usually expressed by means of XPath expressions identifying portions of the selected documents. An XPath expression defines a way of navigating an XML tree and ret...
COMPGEOM
2007
ACM
15 years 1 months ago
2007
ACM
The paper consists of two major parts. In the first part, we re-examine relative -approximations, previously studied in [12, 13, 18, 25], and their relation to certain geometric p...
187
click to vote
ICDE
2004
IEEE
15 years 11 months ago
2004
IEEE
Twig queries represent the building blocks of declarative query languages over XML data. A twig query describes a complex traversal of the document graph and generates a set of el...
108
click to vote
SEM
2004
Springer
15 years 3 months ago
2004
Springer
Large-scale information processing applications must rapidly search through high volume streams of structured and unstructured textual data to locate useful information. Content-ba...
178
click to vote
SIGMOD
2006
ACM
15 years 10 months ago
2006
ACM
This paper introduces the Tuple Graph (TuG) synopses, a new class of data summaries that enable accurate selectivity estimates for complex relational queries. The proposed summari...