Re: [xsl] XSLT 4 xsl:with
2020-05-19 16:09:12
Hi Gerrit,
Thanks for your response, the <xsl:sequence> afterthought you brougtht
up is finally dawning upon me. I did initially read through the thread,
and I also think it is better to use existing vocabulary and to fill the
gaps in the paradigm, rather than to cook up new verbs. It's just that I
/also/ like <xsl:with>, which feels completely familiar to me, even
though it does not exist yet.
@Michael Kay, I am happy to see that the discussion you intended to
provoke with your article and presentation at XML Prague is actually
happening! I was a bit worried that there would not be a single place
where this would going to be, and now there could be two. (for the
unfamiliar:
https://www.xml.com/news/2020-04-slack-workspace-for-the-xml-community/)
Best
Pieter
On 19/05/2020 19:55, Imsieke, Gerrit, le-tex
gerrit(_dot_)imsieke(_at_)le-tex(_dot_)de wrote:
Of course such an xsl:with instruction won't be penalized by HOAXCoQS
[1], unlike xsl:for-each, which reeks of XSLT 1 habits most of the time.
xsl:with won't get brownie points though; I'd consider it "neutral".
But read my previous messages in this thread. Instead of xsl:with I
propose to use a @context-item attribute (an @xsl:context-item
attribute on non-xsl elements). If you really need the kind of wrapper
that xsl:with provides, you can still write
<xsl:sequence context-item="$context">
<xsl:variable .../><!-- @select evaluated in the context of $context
-->
<foo>...</foo><!-- any expression within is also evaluated in the
context of $context -->
<bar>...</bar>
</xsl:sequence>
but most of the time the XSLT code will become more compact because
the context can be set by an attribute on almost any element, not with
an instruction.
-- Gerrit
[1] https://github.com/sydb/HOAXCoQS
On 19.05.2020 19:14, Pieter Lamers pieter(_dot_)lamers(_at_)benjamins(_dot_)nl
wrote:
I think <xsl:with select="..."> is an elegant rewrite of for-each. It
does make me wonder whether it would earn brownie points or penalties
in Gerrit's highly opiniated book.
On 19/05/2020 18:52, Liam R. E. Quin liam(_at_)fromoldbooks(_dot_)org wrote:
On Tue, 2020-05-19 at 08:54 +0000, Pieter Masereeuw
pieter(_at_)masereeuw(_dot_)nl
Because such a for-each does not repeat, I always add a comment like
<!-- Merely sets the context, does not repeat -->.
I tend to comment these too, although not with the repeat part - be
careful, too, as in English a less-informed reader might get an
incorrect impression reinforced that for-each is a loop, rather than a
mapping operator.
Yes, an xsl:with-context-item select=.... would be clearer. Wkether
it's worth increasing the size of the language for it is a judgment
call that's a little harder, i think.
Best,
Liam
--
Pieter Lamers
John Benjamins Publishing Company
Postal Address: P.O. Box 36224, 1020 ME AMSTERDAM, The Netherlands
Visiting Address: Klaprozenweg 75G, 1033 NN AMSTERDAM, The Netherlands
Warehouse: Kelvinstraat 11-13, 1446 TK PURMEREND, The Netherlands
tel: +31 20 630 4747
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