ceur-make intends to output sane RDFa, i.e. RDFa that uses reasonable URIs for things and that is valid w.r.t. the vocabularies used.
However,
ceur-make might be wrong,
Some features (e.g. AUX papers) are not yet supported by ceur-make, and some other features (e.g. linking to machine-comprehensible FOAF user profiles if editors/authors have them) do require manual copy-editing of the RDFa if editors want to have them (and, don't worry, those who want to have this, are usually technically experienced). Any such manual copy-editing might go wrong.
We won't be able to stop the bad practice of bypassing ceur-make and copy-editing existing volumes' index.html files.
An easy way of implementing this would be a combination of
ceur-make intends to output sane RDFa, i.e. RDFa that uses reasonable URIs for things and that is valid w.r.t. the vocabularies used.
However,
An easy way of implementing this would be a combination of