Bug 221521 [Markers] New markers API needs to be pared down
We have too much API in some of the new classes and they can be moved to internals
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/ProblemFilter.java
/**
	 * Tag for contains boolean
	 */
	public static final String TAG_CONTAINS = "contains"; 
	/**
	 * Tag for contains description.
	 */
	public static final String TAG_DESCRIPTION = "description"; 
	private static final String TAG_SELECT_BY_SEVERITY = "selectBySeverity"; 
	/**
	 * Tag for the severity value