APIs for query support [[start|Link to API4KB Main Page]]
   * Ask, tell ...? queries with side effects?  what do you do with inferred knowledge based on the query (post it, not)?
   * Read-only (boolean - can/can't satisfy, or extract if available)
   * Read-write API (i.e. with side effects that can update the KB)
        * Inform -- write something to the KB, but only commit if consistency is preserved (flag)
        * Inform/reason/query -- write something to the KB, reason over the KB, query to get revised results
             * Hypothetical reasoning -- inform/reason/query/rollback
             * Or without rollback, meaning commit the results, but only if consistency is preserved
   * Service discovery (e.g. query to a portal for services pertaining to a certain subject)
   * Determining service capabilities
      * Determine which "semantic profiles" (e.g. OWL 1.1 Full, EL, RL, QL, Common Logic, %%RDF%% Inference, ...) the service recognizes
      * Determine which formats the service recognizes (e.g. %%RDF%%/%%XML%%, %%RDF%%/N3, ...)
      * Determine which query languages are recognized (e.g. SPARQL, graph query language, OWLQL, etc)
   * Response should address which, if any capabilities are mandatory, optional
   * Response should address consistent naming - declare which URIs will be used to identify capabilities

Most of these APIs may require various compliance levels, so that people can support read-only, or inform but not inform/reason/query, or not hypothetical reasoning ... etc.


===== Questions =====
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