ConstA boolean denoting the behaviour of comparators (e.g. <, >, <=, >=) when used with non-lexical literal operands. Non-lexical literal are literals whose value does not belong in the space of it's datatype, e.g. "not-a-number"^^xsd:int
true: compares both operands by datatypes first and if they're equal, their string values are compared. false: throws an error (default).
A boolean denoting the behaviour of comparators (e.g. <, >, <=, >=) when used with non-literal and mixed operands. Such non-literals are IRIs, blank nodes, languageStrings and triple terms. Their comparison is not required by default in SPARQL.
true: compares them. (follows the relative ordering of https://www.w3.org/TR/sparql12-query/#modOrderBy) false: throws an error (default).