<XML><RECORDS><RECORD><REFERENCE_TYPE>3</REFERENCE_TYPE><REFNUM>9309</REFNUM><AUTHORS><AUTHOR>Mustière,S.</AUTHOR><AUTHOR>Gesbert,N.</AUTHOR><AUTHOR>Sheeren,D.</AUTHOR></AUTHORS><YEAR>2003</YEAR><TITLE>A Formal Model for the Specifications of Geographic Databases</TITLE><PLACE_PUBLISHED>International Workshop on Semantic Processing of Spatial Data (GeoPro 2003)</PLACE_PUBLISHED><PUBLISHER>N/A</PUBLISHER><PAGES>152-159</PAGES><ISBN>970-36-0103-0</ISBN><LABEL>Mustière:2003:9309</LABEL><KEYWORDS><KEYWORD>geographical databases</KEYWORD></KEYWORDS<ABSTRACT>In order to capture and manage their geographic databases, database producers use relatively huge and complex documents: the specifications. Actually, these are the only sources of information describing precisely what is the content of a database, i.e. what is the meaning of each part of the data schema, which objects are captured and how they are represented. As such, they are an important tool to describe, manage, distribute, transform and federate databases. Unfortunately, even if they can be precisely organised, these specifications are usually expressed in natural language and thus in a poorly formalised language. Their manipulation is then a hard task, and their automatic manipulation is almost impossible. In this paper we claim that formalising existing specifications is an important task and we propose an object-oriented model in order to do that. This model contains two main parts: a part formalising which objects of the real world should appear in the database, and a part describing how these objects are represented in the database. These models rely on a set of typical criteria encountered in database specifications: geometric criteria, relationship criteria, and nature criteria.</ABSTRACT><URL>http://piig-lab.cic.ipn.mx/geopro/Presentations03.htm</URL></RECORD></RECORDS></XML>