Implementation of a historical/geographical database with support of imprecise dates
Art history data management leads to express dates in a “fuzzy” way, which is not suitable for electronic processing.
A standardized, easy to use, way of coding dates, mantaining all the semantics of the “natural” format, has been defined. Each date is therefore expressed (in the extended way) as a string of characters, with a well defined syntax, while it is really managed as a set of fields, which contain, in a coded way, the same information that are contained in the extended format.
The coded format of dates is easily and transparently managed by every DBMS, thus allowing selection by exact values or by ranges.
This conventional way of managing dates has been tested in the implementation of a DBMS based historico-geographical authority file.
KeywordsExtended Format Probable Date Imprecise Date Historical Geography Semantic Richness
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