XSLT for Phase 1+2+3 conversion from LegalRuleML to RDF

A draft XSLT (triplifyMerger.xsl) will be committed. The results of the XSLT when applied to the validated LegalRuleML instantances in examples/test_triples (normalized serialization) will also be committed, in examples/triplesCollection, and validated as RDF/XML . The triplifyMerger XSLT copies the triplyCollection XSLT and adds some templates, with higher priority, to implement the exceptional handling of Nodes that have both a keyref attribute and modifying properties, as attributes, child elements, text content or all of these. The implementation uses the user-defined function feature of XSLT 2.0 (xsl:function) to create a function that checks if an XML node is a Node that requires merging of a key-referenced element plus the modifying attributes and/or content. In particular, the function returns true if all of the following are true: 1. local name must start with capital letter 2. the node must have a keyref attribute 3. the node must have at least one child element, text node or attribute that is not keyref This function is used to implement the following template: 1. for either lrml or ruleml namespace, create an rdf:Resource node to accept a key attribute (which becomes rdf:ID), and containing a mergerOf collection that references the value of keyref as well as transforms the original element, without the key attribute.