RE: [xsl] saxon:try()

Subject: RE: [xsl] saxon:try()
From: "Michael Kay" <mike@xxxxxxxxxxxx>
Date: Fri, 4 Jan 2008 14:45:55 -0000
>   Interesting.  Do you remember what were the main 
> difficulties?  Maybe there is something publicly available 
> (though I have found nothing myself)?

There was a proposal developed by Mary Fernandez which I thought would work
quite well. It was developed as joint work by the XSL and XQuery groups. On
the XQuery side there were some people who didn't want it at all (too
complex for a version 1 feature), and others who felt it didn't go far
enough (for example in making exceptions first-class objects), but IIRC the
main blocker was that one shouldn't make decisions about try/catch in the
absence of a transaction model, because it would inevitably interact with
rollback/commit. So XQuery decided to leave it to version 2. XSL WG then
considered whether to pick it up independently, and decided not to, partly
because at that stage of development there was reluctance to add anything
that wasn't explicitly on the requirements list because timescales were
already running so late, and partly because we didn't want to be
wrong-footed by anything that came out of joint work later.

Michael Kay

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