Lore: a database management system for semistructured data
ACM SIGMOD Record
On the foundations of the universal relation model
ACM Transactions on Database Systems (TODS)
Human Factors Studies of Database Query Languages: A Survey and Assessment
ACM Computing Surveys (CSUR)
Non first normal form relations to represent hierarchically organized data
PODS '84 Proceedings of the 3rd ACM SIGACT-SIGMOD symposium on Principles of database systems
Human factors evaluation of two data base query languages: square and sequel
AFIPS '75 Proceedings of the May 19-22, 1975, national computer conference and exposition
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DataPlay is a query tool that encourages a trial-and-error approach to query specification. DataPlay uses a graphical query language to make a particularly challenging query specification task - quantification - easier. It constrains the relational data model to enable the presentation of non-answers, in addition to answers, to aid query interpretation. Two novel features of DataPlay are suggesting semantic variations to a query and correcting queries by example. We introduce DataPlay as a sophisticated query specification tool and demonstrate its unique interaction models.