Foundations of logic programming; (2nd extended ed.)
Foundations of logic programming; (2nd extended ed.)
Principles of database and knowledge-base systems, Vol. I
Principles of database and knowledge-base systems, Vol. I
The distributed information search component (Disco) and the World Wide Web
SIGMOD '97 Proceedings of the 1997 ACM SIGMOD international conference on Management of data
Powerdomain of paths for representing object structures
Fundamenta Informaticae
WWW '99 Proceedings of the eighth international conference on World Wide Web
Data on the Web: from relations to semistructured data and XML
Data on the Web: from relations to semistructured data and XML
Comparative analysis of five XML query languages
ACM SIGMOD Record
Foundations of Databases: The Logical Level
Foundations of Databases: The Logical Level
Querying Semistructured Heterogeneous Information
DOOD '95 Proceedings of the Fourth International Conference on Deductive and Object-Oriented Databases
Object Exchange Across Heterogeneous Information Sources
ICDE '95 Proceedings of the Eleventh International Conference on Data Engineering
Information Integration Using Logical Views
ICDT '97 Proceedings of the 6th International Conference on Database Theory
ICDT '97 Proceedings of the 6th International Conference on Database Theory
Approximate Answers in Databases of Labeled Objects
Proceedings of the IIS'2000 Symposium on Intelligent Information Systems
Declarative specification of Web sites with S
The VLDB Journal — The International Journal on Very Large Data Bases
UnQL: a query language and algebra for semistructured data based on structural recursion
The VLDB Journal — The International Journal on Very Large Data Bases
XML-SQL: An XML Query Language Based on SQL and Path Tables
EDBT '02 Proceedings of the Worshops XMLDM, MDDE, and YRWS on XML-Based Data Management and Multimedia Engineering-Revised Papers
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In the paper we deal with the problem of modeling and querying information in schemaless databases of partially labeled objects (PLO-DB). Partially labeled objects are used for modeling data within repositories integrating both structured and semistructured data. The proposed PLO (Partially Labeled Objects) data model originates from the OEM data model and extends it by allowing partial labeling of objects. For PLO-DB we propose a rule-oriented query language PathLog, which data manipulation paradigm is based on set-theoretical operations and on rules (in Datalog style) involving Skolem functions and referential variables. The main contribution of the paper is the development of a formalized and consistent model of schemaless databases of partially labeled objects and its query language PathLog.