The latter is particularly interesting, as I do not know how to work that out... Firstly, I want the CML (Single Molecule) content type extend the CML content type, so that a validating CML editor can open it with the proper schema, but at the same time I would like to extend it a content type representation a Single Molecule. Hence, the multiple inheritance.
This is what the plugin.xml currently looks like:
<extensionVery clearly, a single base-type. Is there any option of multiple inheritance?
name="CML (Single 2D Molecule)"