Bug 119331 Library - name space terminology and behavior
During BIRT 2.0 library feature review meeting the following change was decided. - Change the term namespace to 'prefix' - By default use the library name as the prefix ( namespace ); the dialog to input prefix should be prompted only if hte auto generated prefix is not unique.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dnd/InsertInLayoutUtil.java
{
	/**
	 * Rule interface for defining insertion rule
	 */
	abstract static interface InsertInLayoutRule
	{
		public boolean canInsert( );
		public Object getInsertPosition( );
		public void insert( Object object ) throws SemanticException;
	}
	/**
	 * 
	 * Rule for inserting label after inserting data set column
	 */
	static class LabelAddRule implements InsertInLayoutRule