Re: [xsl] Random UUID in pure XSLT?

["Wendell Piez wapiez@xxxxxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Hi Dimitre,

Yes indeed and I am glad to have all of these in the kit.

This would be a much simpler question if I could guarantee anything about
the users ... however not only may they be unable to call Java, they might
also be off line at runtime. So I have to be able to offer options.

Meanwhile an XSLT implementation of UUID v4 was not as fearsome as I had
supposed it would be. (We'll see how it stands up.)

Thanks again,
Wendell


On Wed, Nov 11, 2020 at 3:35 PM Dimitre Novatchev dnovatchev@xxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

> Hi Wendell,
>
> Dimitre, suggesting the web service option, offers
>
> > for $i in 1 to $N
> >    return  unparsed-text("https://uuidgen.org/api/v/4";)
> >
> > I'll try this ... but what prevents an XSLT engine giving me the same
> result each time? (Oh I see.)
>
> Dr. Kay suggested a fix that will block the deterministic-compliance
> attempts of a hypothetical XPath 3.0+ (or XSLT 2.0) implementation;
>
> for $i in 1 to 100
>   return unparsed-text(concat("https://uuidgen.org/api/v/4?x=";, $i))
>
>
> I say "hypothetical" above, because even Saxon (the 9.9.1.7 versions used
> in Oxygen) is non-compliant and produces all-different results for this
> transformation:
>
> <xsl:stylesheet version="3.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
>   <xsl:output method="text"/>
>
>   <xsl:template match="/">
>     <xsl:sequence select=
>       "for $i in 1 to 100
>          return unparsed-text('https://uuidgen.org/api/v/4')"/>
>
>   </xsl:template></xsl:stylesheet>
>
>
> Interestingly, I have an old version: Saxon 9.1.01, which is compliant to
> the XSLT 2.0 specification and needs the URL-tail addition in order to get
> its determinism bypassed.
>
> HTH, Dimitre
>
>
> On Wed, Nov 11, 2020 at 12:19 PM Wendell Piez wapiez@xxxxxxxxxxxxxxx <
> xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
>> Hi,
>>
>> Dimitre, suggesting the web service option, offers
>>
>> for $i in 1 to $N
>>    return  unparsed-text("https://uuidgen.org/api/v/4";)
>>
>> I'll try this ... but what prevents an XSLT engine giving me the same
>> result each time? (Oh I see.)
>>
>> Update since yesterday -- I've had some apparent success coding up an
>> implementation of UUID v4 using fn:random-number-generator() ... results
so
>> far are here (comments welcome):
>>
>>
>>
https://github.com/wendellpiez/oscal-tools/blob/issue10-uuid-util/xslt/uuid/r
andom-util.xsl
>>
>> The functions are deterministic -- they return the same UUID (or UUID
>> sequence of specified length) for the same seed. In my application, this
is
>> actually a feature.
>>
>> Thanks for all the info and help so far this is great!
>>
>> Cheers, Wendell
>>
>> On Wed, Nov 11, 2020 at 1:32 PM 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
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> XSL-List info and archive <http://www.mulberrytech.com/xsl/xsl-list>
>>>> EasyUnsubscribe <http://lists.mulberrytech.com/unsub/xsl-list/782854>
(by
>>>> email)
>>>>
>>>
>>>
>>> --
>>> 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.
>>>
>>> XSL-List info and archive <http://www.mulberrytech.com/xsl/xsl-list>
>>> EasyUnsubscribe <http://lists.mulberrytech.com/unsub/xsl-list/174322> (by
>>> email)
>>>
>>
>>
>> --
>> ...Wendell Piez... ...wendell -at- nist -dot- gov...
>> ...wendellpiez.com... ...pellucidliterature.org... ...pausepress.org...
>> ...github.com/wendellpiez... ...gitlab.coko.foundation/wendell...
>> XSL-List info and archive <http://www.mulberrytech.com/xsl/xsl-list>
>> EasyUnsubscribe <http://lists.mulberrytech.com/unsub/xsl-list/782854> (by
>> email)
>>
>
>
> --
> 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.
>
> XSL-List info and archive <http://www.mulberrytech.com/xsl/xsl-list>
> EasyUnsubscribe <http://lists.mulberrytech.com/unsub/xsl-list/174322> (by
> email <>)
>


--
...Wendell Piez... ...wendell -at- nist -dot- gov...
...wendellpiez.com... ...pellucidliterature.org... ...pausepress.org...
...github.com/wendellpiez... ...gitlab.coko.foundation/wendell...