[MEI-L] Encoding Notre Dame Polyphonic Neumes

[Joshua Stutter]

Dear all,

Fairly new MEI user, trying to encode some 13th-century Notre Dame 
notation into MEI for a class. MEI has good support for many neumes, but 
I'm attempting to get them to work in a polyphonic context, align 
correctly and with good semantics. Here is a small example which I'm 
attempting to encode:

Small Notre Dame example.

Most of the neumes can be notated and typed with the exception of the 
complex neume FGBGA which does not have a name. This is fine as this 
music does not stick to the usual neume types.

My first issue arises when trying to show the first tenor note D is 
aligned with the porrectus GFG. How would I go about achieving this 
without using semantically-incorrect spacers or invisible rests or 
durations? What I really wish for is the possibility to encode sections 
of polyphony in groups that are aligned together, i.e. the first three 
neumes in the organal voice in one group, then the porrectus in a new 
group with the tenor virga.

The second issue is the vertical lines. They are not barlines, nor 
always rests. They are divisiones with a complex and context-sensitive 
function. Sometimes they function as rests, sometimes they are alignment 
marks, sometimes syllable marks.

The first attached file 'benedicamus-domino.mei' encodes this example 
naively. Nothing is aligned and I use <barLine> where divisiones are.

The second attached file 'benedicamus-domino-wish.mei' is how I wish to 
encode this file, using a made-up element <alignmentGrp> that can 
contain anything a <section> contains. I have also replaced the 
<barLine> with another made-up element <divisio>.

Needless to say, I'm not concerned with the output in verovio, as very 
little neumatic notation is supported anyway, but instead encoding the 
alignment and elements correctly. Is something like this possible in MEI 
already or will I have to dabble in ODD? If I must, are there any links 
to a good workflow and documentation for using ODD with MEI?

Thanks in advance for responding to this quite complex question,

Joshua Stutter.

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