Bug 179674 Support time dimension in model
When define time dimension in model, the "itTime" property will be set. However this is not enough. We also need to know to what precision the time value should be evaluated, say, year, month, day, etc. Model needs to be enhanced to support such requirement.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
/**
	 * Write the action structure.
	 * 
	 * @param action
	 *            action structure instance.
	 * @param propName
	 *            the property name of action structure on the element.
	 */
	protected void writeAction( Action action, String propName )
	{
		String linkType = (String) action.getProperty( getModule( ),
				Action.LINK_TYPE_MEMBER );
		writer.startElement( DesignSchemaConstants.STRUCTURE_TAG );
		writer.attribute( IDesignElementModel.NAME_PROP, propName );
		property( action, Action.FORMAT_TYPE_MEMBER );
		property( action, Action.LINK_TYPE_MEMBER );
		if ( DesignChoiceConstants.ACTION_LINK_TYPE_HYPERLINK
				.equalsIgnoreCase( linkType ) )
		{
			property( action, Action.URI_MEMBER );
			property( action, Action.TARGET_WINDOW_MEMBER );
			property( action, Action.TARGET_FILE_TYPE_MEMBER );
		}
		else if ( DesignChoiceConstants.ACTION_LINK_TYPE_BOOKMARK_LINK
				.equalsIgnoreCase( linkType ) )
		{
			property( action, Action.TARGET_BOOKMARK_MEMBER );
			property( action, Action.TARGET_BOOKMARK_TYPE_MEMBER );
		}
		else if ( DesignChoiceConstants.ACTION_LINK_TYPE_DRILL_THROUGH