We will also allow internal text and internal form

I'll have to re-read the blorb docs, but I think internal form is not needed. It's the automatic result of using internal data when the data file is IFF-formatted (e.g. an AIFF or Quetzal file).

I would assume this is implausible and that there is no provision for non-objects to have a kind hierarchy. But it would be kind of nice if one could have file variables that could be asigned either of an external file or an internal file and one could write generic phrases that could handle either, facilitating things like: "use a user-provided file if there is one; otherwise fall back to included file".

Will internal file and internal text be able to have properties (like Figure and Sound) or not (like external files)?