Configuration:
	(namespace = Namespace)
	//('import' Imports)*
	(elements += Element)*
;

Namespace:
	name = ID
;
/*
Imports:
	'import' ImportsDef (',' ImportsDef)* // Doesn't work!?
;

ImportsDef:
	imports += [Namespace]
;
*/	
Element:
	attributeDefinitions += AttributeDefinition
	| objectDefinitions += ObjectDefinition
;

AttributeDefinition:
	'*' name = ID '(' type = AttributeType ')'
	(translation += Translation)*
	(possibleValues += PossibleValues
	| defaultValue += DefaultValue
	| (internalProperties += InternalProperty)
	| ('-' (externalProperty += ExternalProperty)))*
;

AttributeReference:
	'*' name = [AttributeDefinition|ID]
	(attrTranslation += AttributeTranslation)*
	((overloadedProperties += InternalProperty)
	| ('-' (externalProperty += ExternalProperty)))*
;

PossibleValues:
	'=' (possibleValuesDefaultValue = [PossibleValuesValue|Type])? '(' values += PossibleValuesValue (',' values += PossibleValuesValue)* ')'
;
DefaultValue:
	'=' value = Type
;

PossibleValuesValue:
	name = Type
;

ObjectDefinition:
	'[' name = ID ']' (translation += Translation)*
	(('-' (externalProperty += ExternalProperty)+)
	//| (linkedAttributeDefinition += AttributeDefinition)
	| (referencedAttribute += AttributeReference))*
;

ExternalProperty:
	// AttributeInternalPropertyValue and ObjectAttributeInternalPropertyValue required otherwise we cant have external properties like 'required', 'readOnly' etc
	name = ExternalPropertyName ('=' value = Type)? // Not complete, need more information
;
ExternalPropertyName:
	(ID | InternalPropertyValue | AttributeInternalPropertyValue) ('.' LANGCODE)?
;

Translation:
	name = LANGCODE ':' value = STRING
;
AttributeTranslation:
	name = LANGCODE ':' value = STRING
;

/*
ExternalPropertyValue:
	
;
*/
InternalProperty:
	name = (AttributeInternalPropertyValue | InternalPropertyValue) ('=' value = Boolean)? 
;

InternalPropertyValue:
	'logged'
	| 'readOnly'
	| 'required'
	| 'indexed'
;

AttributeInternalPropertyValue:
	'multiValued'
	| 'protected'
;

Boolean:
	'true' 
	| 'false'
;

Type:
	STRING
	| '-'? INT
	| Boolean
;

AttributeType:
	'string'
	| 'double'
	| 'date'
	| 'long'
	| 'boolean'
	| 'objref'
;

terminal LANGCODE	: ('a'..'z')('a'..'z');

demo

* valuta (double) sv:"valuta" en:"currency"
	required indexed readOnly
	= "fredag" ("måndag", "tisdag","onsdag", "torsdag", "fredag", "lördag" , "söndag")

* day (string) sv:"Dag" en:"Day"
	= "fredag" ("måndag", "tisdag","onsdag", "torsdag", "fredag", "lördag" , "söndag")

* name (string) sv:"Förnamn" en:"First name"
	required
	- fieldLength=14
	= 0

* attribute (long)
	= 1 (2, 4, 1, -2)

[object] // <----- ObjectDefinition
	- mailFromAddress="a_mail@adress.se"
	* valuta sv:"hej"  // <----- AttributeRefrence 
		logged // <----- This one....
	* day // <------ AttributeRefrence 
		logged // <----- collides with this one (error: Duplicate InternalProperty logged)
	* name
		required=false logged
	* attribute

[testObj] sv:"Ett test" en:"A test"
	- extAttr='någonting'
	- aTrueExtAttr
	* valuta sv:"PENGAR" en:"Money"