Hi Gioele,

Neither an ODD nor a Schematron approach: You can use a second RNG 
schema. Here is a sample schema (that also serves as a blog post about 
this approach):

I tried to prescribe div/@type attributes in such a way that the types 
correspond to DocBook element names, and the grammar is (roughly) the 
same as in DocBook. So you have parts or chapters in the body, prefaces 
and dedications in the frontmatter, etc.

The nice thing is that you superimpose a bespoke grammar on an 
off-the-shelf TEI schema. An actual grammar refining an unaltered base 
schema, if that doesn’t sound compelling. You can’t do this with 
Schematron so handily.

A sample document is here:
If you open it in oXygen and add a type attribute to body/div, you will 
be presented with a choice of part and chapter.
This is the good news.
The bad news is that there will be no other completion hints than those 
from the epischema – unless you swap the xml-model PIs at the top, but 
then you’ll only have the default TEI vocabulary as suggestions.
Maybe we can convince the oXygen people to restrict the autocomplete 
options to the intersection of the choices that all referenced schemas 
offer at a given location.


On 22.06.2016 18:14, Gioele Barabucci wrote:
> Hello,
> in ODD, how can I change the constraints of the <div> elements that
> appear in a certain position (e.g., /TEI/text/body) while using the
> default definition for all the other elements?
> I could specify those constraints as a set of Schematron assertions, but
> those would not be picked up by, for example, oXygen for the automatic
> completion of element names and attribute values.
> In RelaxNG one can give two different definitions of <div>: one for
> those elements appearing in a certain production, and another for all
> the others contexts. Can the same thing be done in ODD?
> The use case for this request is that I would like <div>s in
> /TEI/text/body to contain only few whitelisted elements, while allowing
> <div> in other places (mainly the header) to be unconstrained.
> Note: Element names and element definitions are separate entities in
> RelaxNG; in ODD it looks like element names and their definitions cannot
> be separated (I suppose this has to do with DTD support). Probably this
> means that what I am looking for cannot be done, but I think it is worth
> asking anyway.
> Regards,

Gerrit Imsieke
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