2017-08-04: Continued on xpath project. See "Task Notes" in [[Patent Schema Reconciliation]].
2017-08-24: For xpath project, added cpc_subclass, cpc_main-group, and cpc_subgroup to Patent Schema Reconciliation text.txt in E:\McNair\Projects\SimplerPatentData\data\examples\Patent Schema Reconciliation. Listed examples for classification_national_class in [[Patent Schema ReconciliationEquivalent XPath and APS Queries]].