159 search results - page 5 / 32 » Performing grouping and aggregate functions in XML queries |
SIGMOD
2006
ACM
14 years 7 months ago
2006
ACM
This paper presents a principled framework for efficient processing of ad-hoc top-k (ranking) aggregate queries, which provide the k groups with the highest aggregates as results....
VLDB
2002
ACM
13 years 7 months ago
2002
ACM
Structurally recursive XML queries are an important query class that follows the structure of XML data. At present, it is difficult for XQuery to type and optimize structurally re...
ECAI
2010
Springer
13 years 8 months ago
2010
Springer
Abstract. Machine learning techniques are increasingly being applied to problems in the domain of information retrieval and text mining. In this paper we present an application of ...
SBBD
2004
13 years 8 months ago
2004
In order to index text fields in XML databases for similarity queries, M-Trees may be applied. However, some datasets experiments using M-Trees for this purpose resulted in low qu...
WIDM
2004
ACM
14 years 24 days ago
2004
ACM
In this paper, we propose a novel compact tree (Ctree) for XML indexing, which provides not only concise path summaries at the group level but also detailed child-parent links at ...