The functional data model and the data languages DAPLEX
ACM Transactions on Database Systems (TODS)
Extending the database relational model to capture more meaning
ACM Transactions on Database Systems (TODS)
A relational model of data for large shared data banks
Communications of the ACM
SIGMOD '83 Proceedings of the 1983 ACM SIGMOD international conference on Management of data
Data Structures for an Integrated Data Base Management and Information Retrieval System
VLDB '82 Proceedings of the 8th International Conference on Very Large Data Bases
A Model for Integrated Information Systems
VLDB '83 Proceedings of the 9th International Conference on Very Large Data Bases
SEQUEL: A structured English query language
SIGFIDET '74 Proceedings of the 1974 ACM SIGFIDET (now SIGMOD) workshop on Data description, access and control
Design of an Integrated Information Retrieval/Database Management System
IEEE Transactions on Knowledge and Data Engineering
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There is no such thing as a standard document. Bibliographic information comes in a wide variety of formats. Existing retrieval systems handle different document styles either by creating an artificial document type or by providing different and independent data bases. Neither approach seems satisfactory. In this paper we describe a data model which we feel is more appropriate for document representation and show it can handle the multiple document type problem quite naturally.