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dc.contributor.advisorDolk, Daniel R.
dc.contributor.authorBarnes, Christopher A.
dc.date1990-09
dc.date.accessioned2013-11-20T23:33:44Z
dc.date.available2013-11-20T23:33:44Z
dc.date.issued1983-06
dc.identifier.urihttp://hdl.handle.net/10945/37560
dc.description.abstractThis thesis presents a simple and efficient method of implementing a semantic type checking system for use with relational databases. Numeric data typically represent measures of a specific property or characteristic of a real world object. Computers manipulate only the numeric value. It is the responsibility of the user to ensure that the data are handled in a manner consistent with its meaning. If the semantics associated with the numbers are stored in a data dictionary, semantic consistency can be verified by the database system. This increases the integrity of data manipulation and helps ensure meaningful results. This thesis demonstrates a simple scheme of representing the property, or quantity, and unit of measure associated with numeric attributes. This information is then used to verify dimensional consistency of database queries and to automatically convert units across systems of measurement. Finally, a concept is defined for each relation in the database. These concepts can be used to build a concept hierarchy to help ensure queries are consistent with the semantics of the database design.en_US
dc.description.urihttp://archive.org/details/concepthierarchi1094537560
dc.format.extentv, 75 p. bill.en_US
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.subject.lcshSystems engineeringen_US
dc.subject.lcshSemanticsen_US
dc.subject.lcshDatabasesen_US
dc.titleConcept hierarchies for extensible databasesen_US
dc.typeThesisen_US
dc.contributor.secondreaderBradley, Gordon H.
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.schoolNaval Postgraduate School (U.S.)
dc.contributor.departmentInformation Systems
dc.subject.authorDatabase designen_US
dc.subject.authordata manipulationen_US
dc.subject.authorsemantic networksen_US
dc.description.serviceLieutenant, United States Navyen_US
etd.thesisdegree.nameM.S. in Information Systemsen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineInformation Systemsen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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