188 search results - page 31 / 38 » An Effective Data Placement Strategy for XML Documents |
SACMAT
2006
ACM
14 years 1 months ago
2006
ACM
In this paper we propose an access control model for the Resource Description Framework (RDF). We argue that existing access control models, like the ones developed for securing e...
EACL
2003
ACL Anthology
13 years 8 months ago
2003
ACL Anthology
One of the major challenges in TRECstyle question-answering (QA) is to overcome the mismatch in the lexical representations in the query space and document space. This is particul...
SIGIR
2003
ACM
14 years 21 days ago
2003
ACM
We present a non-traditional retrieval problem we call subtopic retrieval. The subtopic retrieval problem is concerned with finding documents that cover many different subtopics ...
SIGIR
2006
ACM
14 years 1 months ago
2006
ACM
Pseudo-relevance feedback has proven to be an effective strategy for improving retrieval accuracy in all retrieval models. However the performance of existing pseudo feedback meth...
VLDB
2004
ACM
14 years 24 days ago
2004
ACM
This paper presents a novel and complementary technique to optimize an XPath query by minimizing its wildcard steps. Our approach is based on using a general composite axis called...