Excellent questions. In reverse order:
* Absolutely OK for <teiCorpus> to nest. (But more on this later
* Where does the text say <text> cannot be in <teiCorpus>? In the
old days it certainly was the case that <text> was not allowed.
But in more modern times, if I understand correctly,
model.resourceLike+ was added to the content model in order to
accommodate the case of an <fsdDecl> or <facsimile> that applied
to the entire corpus, and then separate transcriptions of each
portion of the corpus (in a <TEI>). Have to think about whether
<text> should be excluded from the content model, or included in
> Is it really right that <teiCorpus> can contain <text> directly?
> The text in the guidelines indicates <teiCorpus> cannot, but the data
> model says it can (as also fsdDecl, facsimile, sourceDoc).
> And it is OK for <teiCorpus> to nest?