Bug 213126 Add support for DataEngine-leve dataset cache
In many cases the DataEngine-leve dataset cache is useful which ensure that a dataset is executed one time during rendering one report. To support this feature a new dataset property should be added. The Birt customer can choose whether this dataset need to be cached or not by setting the property in deisgn time.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
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
				.equalsIgnoreCase( linkType ) )
		{
			property( action, Action.REPORT_NAME_MEMBER );
			property( action, Action.TARGET_BOOKMARK_MEMBER );
			property( action, Action.TARGET_BOOKMARK_TYPE_MEMBER );
			property( action, Action.TARGET_WINDOW_MEMBER );
			property( action, Action.TARGET_FILE_TYPE_MEMBER );
			writeStructureList( action, Action.PARAM_BINDINGS_MEMBER );
			writeStructureList( action, Action.SEARCH_MEMBER );
		}