RIF-FLD implementation

This is to report a definition of a RIF dialect as a specialization from
RIF-FLD (= an implementation of RIF-FLD).
The dialect is called RIF-CASPD (Core Answer Set Programming Dialect).
Since the instructions at
http://www.w3.org/2005/rules/wiki/How_to_Submit_an_Implementation_Report
are geared towards implementations of RIF dialect processors, not of RIF-FLD,
I am attaching the definition of the dialect instead.

michael