Fixed MPRG HTML to use normalized UoM value function everywhere

@@ -1727,7 +1727,8 @@ ep-core:kiloNewton
 ep-core:kilogram
       rdf:type ep-core:Scale , owl:DatatypeProperty , owl:FunctionalProperty ;
       rdfs:domain ep-core:Mass ;
-      rdfs:label "kilogram"^^xsd:string .
+      rdfs:label "kilogram"^^xsd:string ;
+      ep-core:unitSymbol "kg"^^xsd:string .
 
 ep-core:kilogram_dm-3
       rdf:type ep-core:Scale , owl:DatatypeProperty , owl:FunctionalProperty ;
@@ -1735,7 +1736,8 @@ ep-core:kilogram_dm-3
 
 ep-core:kilogram_l-1
       rdf:type ep-core:Scale , owl:DatatypeProperty , owl:FunctionalProperty ;
-      rdfs:label "kilogram per litre"^^xsd:string .
+      rdfs:label "kilogram per litre"^^xsd:string ;
+      ep-core:unitSymbol "kg/L"^^xsd:string .
 
 ep-core:kilogram_m-3
       rdf:type ep-core:Scale , owl:DatatypeProperty , owl:FunctionalProperty ;
@@ -2340,7 +2342,8 @@ ep-core:megahertz
 ep-core:megajoule
       rdf:type ep-core:Scale , owl:DatatypeProperty , owl:FunctionalProperty ;
       rdfs:domain ep-core:Work ;
-      rdfs:label "megajoules"^^xsd:string .
+      rdfs:label "megajoules"^^xsd:string ;
+      ep-core:unitSymbol "MJ"^^xsd:string .
 
 ep-core:megajoule_m-3
       rdf:type ep-core:Scale , owl:DatatypeProperty , owl:FunctionalProperty ;