Bug 196894 BIRT Cross tab, Cube - Time dimension enhancements
There were a couple of time dimension related enhancments planned post BIRT 2.2. This entry is to track those. This enhancments also includes - supporting additional predefined data time formats, that could make it easier to define data time dimension and use it in data items.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
* 
	 * @param obj
	 *            the element that contains user properties
	 */
	protected void writeUserPropertyDefns( DesignElement obj )
	{
		List props = obj.getLocalUserProperties( );
		if ( props == null || props.size( ) == 0 )
			return;
		writer.startElement( DesignSchemaConstants.LIST_PROPERTY_TAG );
		writer.attribute( DesignSchemaConstants.NAME_ATTRIB,
				IDesignElementModel.USER_PROPERTIES_PROP );
		Iterator iter = props.iterator( );
		while ( iter.hasNext( ) )
		{
			UserPropertyDefn propDefn = (UserPropertyDefn) iter.next( );
			writer.startElement( DesignSchemaConstants.STRUCTURE_TAG );
			property( propDefn, UserPropertyDefn.NAME_MEMBER );
			property( propDefn, UserPropertyDefn.TYPE_MEMBER );
			property( propDefn, UserPropertyDefn.ISVISIBLE_MEMBER );
			resourceKey( propDefn, UserPropertyDefn.DISPLAY_NAME_ID_MEMBER,
					UserPropertyDefn.DISPLAY_NAME_MEMBER );
			
			if ( propDefn.getDefault( ) != null )
				writeEntry( DesignSchemaConstants.PROPERTY_TAG,
						UserPropertyDefn.DEFAULT_MEMBER, propDefn.getXmlValue(
								null, propDefn.getDefault( ) ), false );
			IChoiceSet choiceSet = propDefn.getChoices( );
			if ( choiceSet != null && choiceSet.getChoices( ) != null
					&& choiceSet.getChoices( ).length > 0 )