[xquery-talk] Random number generation : requirements

[Christian Grün]

And here is the Random Module of BaseX:

  http://docs.basex.org/wiki/Random_Module

Similar to Zorba, most functions are non-deterministic. Is there any
particular reason why the official random functions need to be
deterministic?

Hope this helps,
Christian


On Tue, May 6, 2014 at 7:42 PM, Matthias Brantner
<matthias.brantner at 28msec.com> wrote:
> Michael
>
> Here is the documentation of a module containing functions to generate
> random numbers or strings with Zorba.
>
> http://www.zorba.io/documentation/latest/modules/zorba/xdm/atomic/random
>
> Please note that some functions are using Zorba's nondeterministic annotation.
> Also note, that there is one function that creates uuids returned as string.
>
> The functions have proven themselves useful in plenty of scenarios like
> password or web session token generation.
>
> I hope you find this module useful.
>
> Matthias
>
> On May 6, 2014, at 9:53 AM, Michael Kay <mike at saxonica.com> wrote:
>
>> The W3C WGs are looking at the idea of introducing a random-number function of some kind in XPath 3.1. The challenge of course is making this both usable and a pure function with no side-effects. We have various design ideas which we need to test against requirements.
>>
>> If you have any applications that use or need such a function, please could I have a brief description of the way it uses random numbers, e.g. just wanting a single random number, a random permutation of 52 integers, an arbitrary sequence of random numebrs for test data generation, etc.
>>
>> If you're currently using the EXSLT random-sequence() function, please share your experience with it.
>>
>> Michael Kay
>> Saxonica
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>
>
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