XHTML: export of ReqIF.Prefix Property of VP Requirements

I try to edit VP requirements with XHTML addon. Identifier, Name, Long Name, Chapter Name, Text and Type are successfully edited but the property “ReqIF.Prefix” is not edited. Nethertheless, it is a default property of Doors importation.
How could I export this property in a XHTML file?

thank you

Copyright © Eclipse Capella, the Eclipse Capella logo, Eclipse and the Eclipse logo are Trademarks of The Eclipse Foundation.