Added the iterface file

+# baseURI: http://standards.iso.org/iso/15926/-12/ed-1/tech/ontology/ilap-npd-interface/v-1
+# imports: http://standards.iso.org/iso/15926/-12/ed-1/tech/ontology/life-cycle-integration/v-2
+
+@prefix ilap-npd-interface:  <http://data.posccaesar.org/npd/ontology/ilap-interface/> .
+@prefix lci:     <http://standards.iso.org/iso/15926/tech/ontology/> .
+@prefix owl:     <http://www.w3.org/2002/07/owl#> .
+@prefix rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+@prefix rdfs:    <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix xsd:     <http://www.w3.org/2001/XMLSchema#> .
+
+<http://standards.iso.org/iso/15926/-12/ed-1/tech/ontology/ilap-npd-interface/v-1>
+      rdf:type owl:Ontology ;
+      owl:imports <http://standards.iso.org/iso/15926/-12/ed-1/tech/ontology/life-cycle-integration/v-2> .
+
+<http://standards.iso.org/iso/15926/-12/ed-1/tech/ontology/ilap-npd-interface/v-1#>
+      rdf:type owl:Ontology ;
+      owl:imports <http://standards.iso.org/iso/15926/-12/ed-1/tech/ontology/life-cycle-integration/v-2> ;
+      owl:versionInfo "Created with TopBraid Composer"^^xsd:string .
+
+ilap-npd-interface:Company
+      rdf:type owl:Class ;
+      rdfs:subClassOf lci:Organization .
+
+ilap-npd-interface:Facility
+      rdf:type owl:Class ;
+      rdfs:subClassOf lci:PhysicalObject .
+
+ilap-npd-interface:Field
+      rdf:type owl:Class ;
+      rdfs:subClassOf ilap-npd-interface:TemporalPartOfAField .
+
+ilap-npd-interface:FixedFacility
+      rdf:type owl:Class ;
+      rdfs:subClassOf ilap-npd-interface:Facility .
+
+ilap-npd-interface:MoveableFacility
+      rdf:type owl:Class ;
+      rdfs:subClassOf ilap-npd-interface:Facility .
+
+ilap-npd-interface:SubSurfaceFixedFacility
+      rdf:type owl:Class ;
+      rdfs:subClassOf ilap-npd-interface:FixedFacility .
+
+ilap-npd-interface:SurfaceFixedFacility
+      rdf:type owl:Class ;
+      rdfs:subClassOf ilap-npd-interface:FixedFacility .
+
+ilap-npd-interface:TemporalPartOfAField
+      rdf:type owl:Class ;
+      rdfs:subClassOf lci:PhysicalObject .
+
+ilap-npd-interface:Well
+      rdf:type owl:Class ;
+      rdfs:subClassOf lci:PhysicalObject .
+
+ilap-npd-interface:Wellbore
+      rdf:type owl:Class ;
+      rdfs:subClassOf lci:PhysicalObject .