BW7.30: hierarchy loading on customer fields

Hi experts

We have a field in ERP with a hierarchy.

There is no content datasource for hierarchy extraction available.

Is the flatfile datasource the only way to create hierarchies in SAP BW?

http://scn.sap.com/community/data-warehousing/bw/blog/2012/01/08/bw-730-hierarchy-loading-becomes-easier-with-the-help-of-new-framework