Re: [xsl] Random UUID in pure XSLT?

["Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

That's a great explanation, Dr. Kay!

I was using the XPath/XQuery Builder tool and it indeed produces a new
result on each invocation.

Thanks,
Dimitre

On Wed, Nov 11, 2020 at 11:19 AM Michael Kay mike@xxxxxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

> 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 <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
> ---------------------------------------
> Truly great madness cannot be achieved without significant intelligence.
> ---------------------------------------
> To invent, you need a good imagination and a pile of junk
> -------------------------------------
> Never fight an inanimate object
> -------------------------------------
> To avoid situations in which you might make mistakes may be the
> biggest mistake of all
> ------------------------------------
> Quality means doing it right when no one is looking.
> -------------------------------------
> You've achieved success in your field when you don't know whether what
> you're doing is work or play
> -------------------------------------
> To achieve the impossible dream, try going to sleep.
> -------------------------------------
> Facts do not cease to exist because they are ignored.
> -------------------------------------
> Typing monkeys will write all Shakespeare's works in 200yrs.Will they
> write all patents, too? :)
> -------------------------------------
> Sanity is madness put to good use.
> -------------------------------------
> I finally figured out the only reason to be alive is to enjoy it.
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--
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
Never fight an inanimate object
-------------------------------------
To avoid situations in which you might make mistakes may be the
biggest mistake of all
------------------------------------
Quality means doing it right when no one is looking.
-------------------------------------
You've achieved success in your field when you don't know whether what
you're doing is work or play
-------------------------------------
To achieve the impossible dream, try going to sleep.
-------------------------------------
Facts do not cease to exist because they are ignored.
-------------------------------------
Typing monkeys will write all Shakespeare's works in 200yrs.Will they write
all patents, too? :)
-------------------------------------
Sanity is madness put to good use.
-------------------------------------
I finally figured out the only reason to be alive is to enjoy it.