[dsdl-discuss] Re: FW: DSDL: Physical validation

In the proposal I made last year for Part 7, the constraints
> * Specific characters must be represented using particular entities
> (e.g. non-breaking spaces as  )
> * Specific characters must be included as native characters
> rather than
> as entities or character references
> * Character references must use the hexadecimal version
> rather than the
> decimal version of the character's codepoint

could and should not be checked. I think these constraints would need an exra kind of specification and validation, part 7 is just about the repertoire and not about the encoding.

I think these are nice requirements, we have similar constraints (like "use just 7 bit US-ASCII and decimal character references"). Whether or not it should be part of a Document Schema Definition I don't know. My feeling is YES, processing IS part of a definition i.m.h.o.

Diederik

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