The developed Classification Schema, was based on an enumerative (considered Arabic numeric) system and consists of a hierarchical approach. The developed Knowledge Structure enclosed most of existing terminologies of GIS. The selected discipline was classified as a sub-discipline of the main discipline of Geography. Furthermore, user community, major topics of interest, controlled vocabularies, existing sources on discipline, codes, abbreviations, multiple occurrences, parallel hierarchies etc. were considered. Finally, analyzed information were included to the developed Knowledge Structure...