| American National Standards Institute. X3.135-1989: Database Language --- SQL with Integrity Enhancement. New York, NY, 1989. |
....of the requested objects to display, and a relation that must evaluate to true for each instance of the knowledge base objects that is a member of the displayed result. The select command has the most elaborate syntax and semantics of all the SPA commands: it is implemented as a subset of the SQL [2, 16, 5] relational database query language. A formal semantics of the select command is given in [29] Once the select command is parsed, a FROBS forward chaining rule is built and fired. The purpose of the rule is to examine all instances of the knowledge base objects specified in slot list. The ....
American National Standards Institute. X3.135-1989: Database Language --- SQL with Integrity Enhancement. New York, NY, 1989.
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