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Re: Follow-up question wrt the previous post

From: mozer <xmlizer@gmail.com>
Date: Mon, 18 May 2009 19:29:29 +0200
Message-ID: <21d9ade60905181029n701e6a33rac4c02f7fccd5f18@mail.gmail.com>
To: "Henry S. Thompson" <ht@inf.ed.ac.uk>
Cc: xproc-dev@w3.org
Henry,

Do you have a strong use case for that feature ?

Xmlizer

On Thu, May 14, 2009 at 2:01 PM, Henry S. Thompson <ht@inf.ed.ac.uk> wrote:
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> So, if I want to detect and handle specially the case where an
> optional option has not been specificed, how can I do so?
>
> Using p:try seems awfully heavyweight.
>
> In XSLT, I can distinguish between the empty string and the empty node
> set, so we see the common idiom
>
>  <xsl:param name="foo" select="xyzzy"/>
>
> But since XProc options are always string-valued, there's no obvious
> default which can be reliably distinguished from a supplied value.
>
> ht
> - --
>       Henry S. Thompson, School of Informatics, University of Edinburgh
>                         Half-time member of W3C Team
>      10 Crichton Street, Edinburgh EH8 9AB, SCOTLAND -- (44) 131 650-4440
>                Fax: (44) 131 651-1426, e-mail: ht@inf.ed.ac.uk
>                       URL: http://www.ltg.ed.ac.uk/~ht/
> [mail really from me _always_ has this .sig -- mail without it is forged spam]
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Received on Monday, 18 May 2009 17:35:41 GMT

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