Bug 182296 Crosstab - non-numeric measures
Feature request. Looking at the 2.2.M6 release, it seems that measures (the fields that can be in the matrix part of the output) need to be numeric. I looked at the spec documents and it seems there is no requirement for non-numeric measures
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/data/impl/dimension/Hierarchy.java
/**
	 * 
	 * @return
	 * @throws IOException
	 */
	private IDocumentObject createHierarchyDocumentObject( )
			throws IOException
	{	
		return documentManager.createDocumentObject( NamingUtil.getHierarchyDocName( name) );
	}
	/**
	 * 
	 * @return
	 * @throws IOException
	 */
	private IDocumentObject createLevelOffsetDocumentObject( )
			throws IOException
	{
		return documentManager.createDocumentObject( NamingUtil.getHierarchyOffsetDocName( name ) );
	}
	/**
	 * 
	 * @param iterator
	 * @param levelDefs
	 * @throws IOException
	 * @throws BirtException
	 */
	private void saveHierarchyMetadata( IDatasetIterator iterator, ILevelDefn[] levelDefs )
			throws IOException, BirtException
	{