Customizing the footer with information from the current score -- possible?

[Arvid Grøtting]

Hi,

I have several multi-score "\book"s that I want to typeset, and ideally I'd like
to do this from within Lilypond (and not with lilypond-book) to take advantage
of the new line/page breaking (and to keep my tool-chain as short as possible).

Now, I know how to include a full header for each piece.  I'm comfortable enough
with customizing oddFooterMarkup et al with information that I know how to get.
 But there's some information I'd like to get at, that I'm not sure where to 
find.

Is there a way to test (within an oddFooterMarkup redefinition) which piece
(i.e. \score block) I'm in?

Can I test whether this is the first, or indeed last, page of the current \score
(as opposed to the whole book)?

I need this to typeset e.g. copyright information for each score in an
anthology, or information on separate availability (and ISMN) on each part in a
multi-part work.

Cheers,

-- 

Arvid