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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 [email protected] <[email protected]>
Sent: Tuesday, November 10, 2020 3:25 PM
To: xsl-list <[email protected]>
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<https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fstackoverflow.com%2Fquestions%2F8126963%2Fxslt-generate-uuid&data=04%7C01%7Cwendell.piez%40nist.gov%7Ca79eb014ee294d31554908d885b6bb94%7C2ab5d82fd8fa4797a93e054655c61dec%7C1%7C0%7C637406367190194961%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=r772TV7cRU6B%2FBcaClDEAgqwAJL19DhnnNIw7NwyTdc%3D&reserved=0>
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<https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Ffxsl.sourceforge.net%2Farticles%2FRandom%2FCasting%2520the%2520Dice%2520with%2520FXSL-htm.htm&data=04%7C01%7Cwendell.piez%40nist.gov%7Ca79eb014ee294d31554908d885b6bb94%7C2ab5d82fd8fa4797a93e054655c61dec%7C1%7C0%7C637406367190204927%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3mA4ccpndiweGLuePpKUoDXuyxFqdbnKC8%2Bp4WHUOOA%3D&reserved=0>
HTH,
Dimitre
On Tue, Nov 10, 2020 at 8:36 AM Piez, Wendell A. (Fed) [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> 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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