The eEnvPlus Validation Service makes available an implementation for the ATS (Abstract Test Suite) included in the INSPIRE Data Specifications. This service makes use of the OGC free testing facility GML 3.2 (ISO 19136:2007).
This executable test suite (ETS) verifies the conformance of GML datasets with respect to INSPIRE application schemas and also with respect to ISO 19136:2007 (GML 3.2.1).
Supplementary INSPIRE constraints can be verified making use of theme specific schematron files.
Validate your GML files now with respect to INSPIRE