RIF Datatypes and Built-Ins 1.0

This document, developed by the Rule Interchange Format (RIF) Working Group, specifies a list of datatypes, built-in functions and built-in predicates expected to be supported by RIF dialects such as the RIF Core Dialect, the RIF Basic Logic Dialect, and the RIF Production Rules Dialect. Each dialect supporting a superset or subset of the datatypes, built-in functions and built-in predicates defined here shall specify these additions or restrictions. Some of the datatypes are adapted from [XML Schema Datatypes]. A large part of the definitions of the listed functions and operators are adapted from [XPath-Functions]. The rdf:PlainLiteral datatype as well as functions and operators associated with that datatype are adopted from [RDF-PLAINLITERAL].