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>        1) If, as suggested by Jerome McDonough and in the METS
> description, complex documents were to be represented by multiple METS
> objects, with an 'umbrella' object containing divs with mptrs to the
> subsidiary objects, how would one get from the subsidiary object back
> to the umbrella object? I do not see any kind of reverse pointer in
> METS.
>

You're right, there's no reverse pointer, and this is doubtless
one of the reasons why Harvard has asked that we reconsider
the structure of the <mptr> element.  The previous xlink
based syntax for <mptr> in MOA2 allowed you to specify whether
you were linking to something that was a parent or child
object of the current object; METS is missing that.  I'll
be adding that to the list of issues to address in our
meeting in DC.