Data types (Was: Re: [Xpath-ng] Proposal for definition of values/lists)

[David Rosenborg]

> OK.  Do you have in mind something like my proposal at the top of
>
> http://lists.xml.org/archives/xml-dev/200210/msg00006.html
>
> i.e. functions that can take a QName object and either use the current
> in-scope ns decls or take a context node with such decls and convert the
QName
> to string accordingly?

I'm not sure of the semantics of the functions in that post,
but I was primarly thinking of situations where you need to explicitly provide
namespace declarations to ensure proper serialization and/or
other prefix dependant processing.

Speaking of QName related functions, I think the following are
things you should be able to do:

* Convert two strings, one local name and one namespace URI, into a QName
object.
* Convert a string containing a prefixed name into a QName object. It should be
possible to reslove the prefix against in-scope declarations or against
declarations from a node.
* Convert a QName object to two strings, one local name and one namespace URI.
* Convert a QName to a string containing a prefixed name. Also here the
namespace
lookup could be against in-scope declarations or declarations from a node.
* Convert a prefix to a namespace URI
* Convert a namespace URI to a prefix

I'm not saying we should have unique functions for all these cases, just that
it should be possible to do using one or more functions.

Cheers,
David