70 search results - page 4 / 14 » Semistructured data schemas with expressive constraints |
SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
We study the problem of answering queries through a target schema, given a set of mappings between one or more source schemas and this target schema, and given that the data is at...
ICDM
2006
IEEE
14 years 1 months ago
2006
IEEE
Due to their capability for expressing semantics and relationships among data objects, semi-structured documents have become a common way of representing domain knowledge. Compari...
MFCS
2004
Springer
14 years 1 months ago
2004
Springer
We study the complexity of the inclusion, equivalence, and intersection problem for simple regular expressions arising in practical XML schemas. These basically consist of the conc...
ICDE
2006
IEEE
14 years 9 months ago
2006
IEEE
XML schema design has two opposing goals: elimination of update anomalies requires that the schema be as normalized as possible; yet higher query performance and simpler query exp...
AMW
2009
13 years 8 months ago
2009
In data exchange, data are materialised from a source schema to a target schema, according to suitable source-to-target constraints. Constraints are also expressed on the target sc...