Re: [xsl] Random UUID in pure XSLT?

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

Dimitre, I don't know! XSLT too can be beautiful in its way don't you think?

Cheers, Wendell

On Wed, Nov 11, 2020 at 4:12 PM Dimitre Novatchev dnovatchev@xxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

> Hi Wendell,
>
> > 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.)
>
> I would aim at a pure XPath implementation, XSLT is not interesting
> enough p
>
> Thanks,
> Dimitre
>
>
> On Wed, Nov 11, 2020 at 1:06 PM Wendell Piez wapiez@xxxxxxxxxxxxxxx <
> xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
>> 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...
>> 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...