Maybe XSLT could have a built-in function? SPARQL has functions UUID()
and STRUUID(): https://www.w3.org/TR/sparql11-query/#func-uuid
On Tue, Nov 10, 2020 at 9:56 PM Piez, Wendell A. (Fed)
wendell(_dot_)piez(_at_)nist(_dot_)gov
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
XSL-List,
Thanks everyone for your answers so far. Very illuminating.
The good news seems to be as Dimitre reassures us that this is certainly
possible in some form. An extension function of some kind may be in order. I
like both of Mike Kay’s ideas. At its essence, however, this isn’t really a
question about how to extend XSLT’s native capability, but about how to
deploy and support such an extension. (While it seems that no one has
anything for RFC 4122 v4 already wired up.)
So yes (answering Liam), this is for SaxonHE or indeed “generic XSLT
3.0/XPath 3.1”, across a dispersed community of developers only a very few of
whom are XSLT-literate. A low-end, low-security option such as passing a list
of UUIDs in at runtime could even be a possibility, at least for some subset
of users.
Gratefully,
Wendell
From: Dimitre Novatchev dnovatchev(_at_)gmail(_dot_)com
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com>
Sent: Tuesday, November 10, 2020 3:25 PM
To: xsl-list <xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com>
Subject: Re: [xsl] Random UUID in pure XSLT?
Hi Wendell,
This question has definite answers even for XSLT 1.0, see for example this SO
question:
XSLT generate UUID
And we have had pure XSLT 1.0 random sequence generators since 2002 (FXSL):
Casting the Dice with FXSL: Random Number Generation Functions in XSLT
HTH,
Dimitre
On Tue, Nov 10, 2020 at 8:36 AM Piez, Wendell A. (Fed)
wendell(_dot_)piez(_at_)nist(_dot_)gov
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
XSL Friends –
Today I write from the day job, where I am researching the question of how
can I go about producing random UUIDs, in dozens or hundreds, inside an XSLT
pipeline, without extension functions in Saxon. The Java randomUUID()
function works nicely when it’s available, but I need to distribute the
capability for SaxonHE and eventually SaxonJS.
We do not have an available implementation of RFC 4122 v4 “random UUID” in
pure XSLT do we, free to use (and study)? I know the functional nature of the
language makes randomness, um, problematic (when isn’t it?), which sometimes
means workarounds – that’s all fine. Indeed so would calling out to a web
service if it is known to be reliable. I have thought about handing a list of
UUIDs in at runtime, but as I said, there may sometimes be hundreds and
perhaps thousands, which makes that approach seem a bit scary.
Any thoughts or perspective would be most welcome.
Thanks, Wendell
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Cheers,
Dimitre Novatchev
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