User:Phlox/Ontology notes

IS_A / AKO links
Category is used for IS_A hierarchies, because queries can fetch the subcats. EG: to constrain a search to articles on cities that are one form or another locality, search on cat locality would retrieve all the members of its subcats:
 * Locality
 * Towns
 * Settlements
 * Cities
 * Suburb

For employment, this could be useful. EG, consider a constraining a search to people that worked for the US federal government. The person could be encoded as having worked for some obscure office that a researcher didn't even know was US federal government operated. EG, the subcat structure might include:
 * Worked for USGOV
 * Worked for USDOI (United States Department of the Interior)
 * Worked for USGS (United States Geological Survey)
 * Worked for Patuxent Wildlife Research Center

Is part of (aggregation) links
If queries can access nested cats, are the good for aggregations? Consider a cat structure that modeled an IS_PART_OF hierarchy:
 * Family members
 * Spouse
 * Children


 * Note this category doesn't help us. Everyone at some point is a member of a family, but which family?  This cat structure is synonymous with category person.