[RIF] imported RDF in test cases

Some of the imported documents are labeled with a syntax of "NTriples"
and some with "Turtle" (e.g. [1] and[2]).  Would it be ok to label
them all the same?

Stella

[1] http://www.w3.org/2005/rules/wiki/OWL_Combination_Vocabulary_Separation_Inconsistency_1
[2] http://www.w3.org/2005/rules/wiki/RDF_Combination_SubClass_2