Bug 182062 Define and provide Date/Time format value
DateTime type has been supported in BIRT. Now, there's a proposal on support Date/Time type in BIRT Report Designer. In order to enable end user setting the format of Date/Time type, please define and provide format value for both Date and Time.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.elements.ElementVisitor#visitExtendedItem(org.eclipse.birt.report.model.elements.ExtendedItem)
	 */
	public void visitExtendedItem( ExtendedItem obj )
	{
		
		boundColumnsMgr.dealExtendedItem( obj, getModule( ) );
		writer.startElement( DesignSchemaConstants.EXTENDED_ITEM_TAG );
		ExtensionElementDefn extDefn = obj.getExtDefn( );
		if ( extDefn == null )
		{
			attribute( obj, DesignSchemaConstants.EXTENSION_NAME_ATTRIB,
					IExtendedItemModel.EXTENSION_NAME_PROP );
			super.visitExtendedItem( obj );
			resourceKey( obj, IExtendedItemModel.ALT_TEXT_KEY_PROP,
					IExtendedItemModel.ALT_TEXT_PROP );
			
			writeStructureList( obj, IExtendedItemModel.FILTER_PROP );
			
			ContentTree tree = obj.getContentTree( );
			writeContentTree( tree );
		}
		else
		{
			markLineNumber( obj );
			
			attribute( obj, DesignSchemaConstants.EXTENSION_NAME_ATTRIB,
					IExtendedItemModel.EXTENSION_NAME_PROP );