[MEI-L] Placement of Custos and Clefs in Neume Notation

[Tim de Reuse]

Hi MEI-List,

I've been encoding some pages of chant in neume notation, and using the most recent RelaxNG schema for neumes to validate them, but it's showing some behavior I didn't expect. As far as I can tell, it requires <clef> and <custos> elements to be inside <syllable> elements, and never at the same level as them, in the <layer>. I've attached two minimal examples to illustrate. In the online documentation, however, custos and clefs are listed as being contained by<https://music-encoding.org/guidelines/v4/elements/custos.html> <layer> elements as well as <syllable> elements (This seems more natural to me than having them strictly within syllables). The MEI-all schema does successfully validate both of my attached examples.

So, my question is - is this incorrect behavior from the schema, or is there a mistake in the documentation, or is there something else I might be missing?

Thanks for your time,
Tim de Reuse
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