Added include to declaration.

bundles/org.oceandsl.declaration/model/Units.ecore

@@ -58,7 +58,8 @@
     <eLiterals name="mole" value="6" literal="mol"/>
     <eLiterals name="candela" value="7" literal="ca"/>
     <eLiterals name="pascal" value="8" literal="Pa"/>
-    <eLiterals name="Joul" value="9" literal="J"/>
+    <eLiterals name="joule" value="9" literal="J"/>
+    <eLiterals name="celcius" value="10" literal="C°"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="CustomUnit" eSuperTypes="#//PrimitiveUnit #//BasicUnit">
     <eOperations name="render" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString">

bundles/org.oceandsl.declaration/src/org/oceandsl/declaration/Declaration.xtext

@@ -23,10 +23,13 @@ import "http://oceandsl.org/declaration/units" as units
 DeclarationModel returns DeclarationModel:
 	{DeclarationModel}
 	'model' name=ID
+	('include' includes+=Include* )? 
 	('types' types+=DeclaredType* )?
 	(parameterGroupDeclarations+=ParameterGroupDeclaration|featureDeclarations+=FeatureDeclaration)*
 ;
 
+Include: declaration=[DeclarationModel|ID] | path=STRING;
+
 TypeReference returns types::TypeReference:
 	TypeReference_Impl | ArrayType;
 
@@ -146,6 +149,16 @@ enum EPrefix returns units::EPrefix:
 	yocto = 'yocto';
 
 enum ESIUnitType returns units::ESIUnitType:
-	meter = 'meter' | gram = 'gram' | ton = 'ton' | second = 'second' | ampere = 'ampere' | kelvin = 'kelvin' | mole = 'mole' | candela = 'candela' | pascal = 'pascal' | Joul = 'Joul';
+	meter = 'meter' | 
+	gram = 'gram' | 
+	ton = 'ton' | 
+	second = 'second' | 
+	ampere = 'ampere' | 
+	kelvin = 'kelvin' | 
+	mole = 'mole' | 
+	candela = 'candela' | 
+	pascal = 'pascal' |
+	celcius = 'celcius' | 
+	joule = 'Joule';