Christopher B. Jones Alia I. Abdelmoty David Finch Gaihua Fu Subodh Vaid The SPIRIT Spatial Search Engine: Architecture, Ontologies and Spatial Indexing. 125-139 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3234&spage=125 2004 conf/giscience/2004 GIScience db/conf/giscience/giscience2004.html#JonesAFFV04