Logic programming and databases
Logic programming and databases
G-Log: a deductive language for a graph-based data model
G-Log: a deductive language for a graph-based data model
Merging graph-based and rule-based computation: the language G-Log
Data & Knowledge Engineering
XML-GL: a graphical language for querying and restructuring XML documents
WWW '99 Proceedings of the eighth international conference on World Wide Web
SAC '00 Proceedings of the 2000 ACM symposium on Applied computing - Volume 2
Comparative analysis of five XML query languages
ACM SIGMOD Record
Computing graphical queries over XML data
ACM Transactions on Information Systems (TOIS)
G-Log: A Graph-Based Query Language
IEEE Transactions on Knowledge and Data Engineering
WebOQL: Restructuring Documents, Databases, and Webs
ICDE '98 Proceedings of the Fourteenth International Conference on Data Engineering
Quilt: An XML Query Language for Heterogeneous Data Sources
Selected papers from the Third International Workshop WebDB 2000 on The World Wide Web and Databases
Querying XML Specified WWW Sites: Links and Recursion in XML-GL
CL '00 Proceedings of the First International Conference on Computational Logic
IFOX: interface for ordered XQuery an algebraic oriented tool for ordered XQuery visualization
Proceedings of the 2008 ACM symposium on Applied computing
Web and semantic web query languages: a survey
Proceedings of the First international conference on Reasoning Web
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XML is spreading out as a standard for semistructured documents on the Web, so the possibility of querying XML documents which are linked by XML links is becoming a goal to achieve. In this paper we present XML-GLrec, an extended version of the graphical query language for XML documents XML-GL. XML-GL allows to extract and restructure information from XML specified WWW documents. We extend XML-GL in the following directions: (i) XML-GLrec allows to represent XML simple finks, so that it is possible to query whole XML specified WWW sites in a simple and intuitive way; (ii) XML-GLrec improves the expressive power of XML-GL, where only transitive closure can be expressed, by allowing generic recursion; (iii) finally, we permit the user to specify queries in an easier fashion, by allowing sequences of nested query, in the same way as in SQL.