I like these ideas. If type assignment can be done with an XPath expression,
I take that to mean it will be in an attribute value, and that such
attributes will also belong to a namespace (like
http://relaxng.org/ns/type-assignment/1.0). My question is: Will this
namespace also have elements (a vocabulary), and if so, could you express
type-assignment for a given document in a separate document as well as in an
embedded form?
Mike
> -----Original Message-----
> From: Murata Makoto [mailto:]
> Sent: Sunday, August 11, 2002 7:45 PM
> To:
> Subject: [relax-ng] Some ideas about type-assignment
>
>
> - Type-assignment should be useful for XQuery.
>
> - Type-assignment should be useful for data binding tools.
>
> - Type-assignement should be separated from validation (It should be
> possible to do type-assignment without performing validation, and
> vice versa)
>
> - Ideally, deep understanding of the RELAX NG spec (and underlying
> hedge automata) should not be required for implementing
> type-assignemnt. (It might be an idea to create XPath
> expressions from RELAX NG schemas.)
>
> - Type-assignment does not have to be possible for every RELAX NG
> schema. (When it is not possible, diagnostic message should
> be issued.)
>
> - Given a RELAX NG schema and a document, type-assignment should
>
> 1) uniquely determine the datatype (data/text/value/list) of
> each string (i.e. attribute values and mixed contents),
>
> 2) uniquely determine the named pattern for every element,
>
> 3) uniquely determine which group/interleave/choice is applied
> to the content of each element and the value of each attribute,
> and
>
> 4) do (1) for each token created by <list>, and do (3) for
> each token sequence
>
> 5) determine if whitespace is ignorable
>
> Note: I am not sure which of them should be adopted.
>
> - Type-assignment should not impose much burden on schema authors.
>
>
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