added cargo ship operation properties

@@ -29,6 +29,11 @@ ep-material:BasicSedimentAndWater
       rdfs:label "bsw"^^xsd:string , "basic sediment and water"^^xsd:string ;
       rdfs:subClassOf ep-material:Fluid .
 
+ep-material:BatchOfCargo
+      rdf:type owl:Class ;
+      rdfs:label "batch of cargo"^^xsd:string ;
+      rdfs:subClassOf ep-material:QuantityOfMaterial .
+
 ep-material:Brine
       rdf:type owl:Class ;
       rdfs:label "brine"^^xsd:string ;
@@ -576,6 +581,18 @@ ep-material:partMaterialOfPair
       rdfs:range ep-material:Material ;
       rdfs:subPropertyOf ep-material:firstMaterialOfPair .
 
+ep-material:ratioOfMassOfFirstMaterialToVolumeOfSecondMaterial
+      rdf:type owl:FunctionalProperty , owl:ObjectProperty ;
+      rdfs:domain ep-material:MaterialPair ;
+      rdfs:label "ratio of mass of first material to volume of second material"^^xsd:string ;
+      rdfs:range ep-core:Density .
+
+ep-material:reidVaporPressure
+      rdf:type ep-core:Class_of_indirect_property , owl:FunctionalProperty , owl:ObjectProperty ;
+      rdfs:domain ep-core:PhysicalThing ;
+      rdfs:label "Reid vapor pressure"^^xsd:string ;
+      rdfs:range ep-core:Pressure .
+
 ep-material:secondMaterialOfPair
       rdf:type owl:ObjectProperty , owl:FunctionalProperty ;
       rdfs:domain ep-material:MaterialPair ;