Re: [xsl] Random UUID in pure XSLT?

["Michael Kay mike@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

According to the spec, unparsed-text() is deterministic, which means that two
calls with the same argument should return the same result. You're relying on
a Saxon non-conformance, I fear!

Except that if you make the call in a loop, Saxon will probably loop-lift it,
thus becoming conformant and making your code deliver a stream of identical
UUIDs.

You can probably get round it by using
unparsed-text("https://uuidgen.org/api/v/4 <https://uuidgen.org/api/v/4>?x="
|| position())

Michael Kay
Saxonica

> On 11 Nov 2020, at 18:32, Dimitre Novatchev dnovatchev@xxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> >  how can I go about producing random UUIDs, in dozens or hundreds, inside
an XSLT pipeline, without extension functions in Saxon.
>
> This is actually very easy and doesn't require the use of any extension
functions:
>
> unparsed-text("https://uuidgen.org/api/v/4 <https://uuidgen.org/api/v/4>")
>
> or if you need N of them:
>
> for $i in 1 to $N
>    return  unparsed-text("https://uuidgen.org/api/v/4
<https://uuidgen.org/api/v/4>")
>
>
>
> p
>
> HTH, Dimitre
>
> On Tue, Nov 10, 2020 at 8:36 AM Piez, Wendell A. (Fed) wendell.piez@xxxxxxxx
<mailto:wendell.piez@xxxxxxxx> <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx
<mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>> wrote:
> XSL Friends b
>
>
>
> 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 itbs available, but I need to distribute the capability
for SaxonHE and eventually SaxonJS.
>
>
>
> We do not have an available implementation of RFC 4122 v4 brandom UUIDb
in pure XSLT do we, free to use (and study)? I know the functional nature of
the language makes randomness, um, problematic (when isnbt it?), which
sometimes means workarounds b thatbs 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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