Bug 119550 Default Value of Named Expression can't be saved in design file
New a report, set named expression in the report property editor add a named expression and set the default value add a report item, say table, to the layout set the named expression of the report item add a named expression and set hte default value save the report close the report and reopen, and there is no default named expression value displayed. open report design file with a text editor, there is no default value associate with the named expression
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/parser/UserPropertyStructureState.java
{
		ChoiceStructureListState( ModuleParserHandler theHandler,
				DesignElement element, PropertyDefn propDefn, IStructure struct )
		{
			super( theHandler, element, propDefn, struct );
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.birt.report.model.util.AbstractParseState#parseAttrs(org.xml.sax.Attributes)
		 */
		public void parseAttrs( Attributes attrs ) throws XMLParserException
		{
			String name = attrs.getValue( DesignSchemaConstants.NAME_ATTRIB );
			if ( StringUtil.isBlank( name ) )
			{
				handler.getErrorHandler( ).semanticError( new DesignParserException(
						DesignParserException.DESIGN_EXCEPTION_NAME_REQUIRED ) );
				valid = false;
				return;
			}
			if ( !UserPropertyDefn.CHOICES_MEMBER.equalsIgnoreCase( name ) )
			{
				DesignParserException e = new DesignParserException(
						new String[]{name},
						DesignParserException.DESIGN_EXCEPTION_UNDEFINED_PROPERTY );
				RecoverableError.dealUndefinedProperty( handler, e );
				valid = false;