158 search results - page 22 / 32 » Expressive languages for path queries over graph-structured ... |
XSYM
2004
Springer
14 years 27 days ago
2004
Springer
A key step in the optimization of declarative queries over XML data is estimating the selectivity of path expressions, i.e., the number of elements reached by a specific navigatio...
CAISE
2003
Springer
14 years 23 days ago
2003
Springer
Abstract. Even though SQL has become widely accepted as a language for implementing relational database schemas and querying data, there are cases where s experience the need for n...
ICDT
1995
ACM
13 years 11 months ago
1995
ACM
We investigate and compare two forms of recursion on sets for querying nested collections. The rst one is called sri and it corresponds to sequential processing of data. The second...
SIGMOD
2008
ACM
14 years 7 months ago
2008
ACM
We study the problem of querying relational data embedded in XML. Relational data can be represented by various tree structures in XML. However, current XML query methods, such as...
HICSS
1996
IEEE
13 years 11 months ago
1996
IEEE
In this paper, we present a document model which integrates the logical structure and hypertext link structure of hyperdocuments in order to manage structured documents with hyper...