[PD-dev] Re: common date format for Pd

Hans-Christoph Steiner hans at eds.org
Mon Jun 12 18:56:15 CEST 2006


Looking at this page, I am thinking maybe the unified format should  
keep the separators:

http://www.w3.org/TR/NOTE-datetime

Complete date plus hours and minutes:
    YYYY-MM-DDThh:mmTZD (eg 1997-07-16T19:20+01:00)
Complete date plus hours, minutes and seconds:
    YYYY-MM-DDThh:mm:ssTZD (eg 1997-07-16T19:20:30+01:00)
Complete date plus hours, minutes, seconds and a decimal fraction of a
second
    YYYY-MM-DDThh:mm:ss.sTZD (eg 1997-07-16T19:20:30.45+01:00)

.hc

On Jun 12, 2006, at 12:47 PM, Hans-Christoph Steiner wrote:

>
> Since Pd only has 19bits of integer resolution, we can't use UNIX  
> time within Pd. So I was thinking that perhaps ISO format would  
> would well in Pd since its a symbol:
>
> For example:
>
> Today is 2006-06-12.  This email was sent written at 12:40:23.  All  
> of this can be lumped together as 20060612T124023.  I am not sure  
> if this ISO unified date/time format officially supports fractional  
> seconds, but since it does support fractional seconds in the time  
> (12:40:23.2342), and the digit positions are fixed, so I think we  
> can easily just tack on fractional seconds like this:  
> 20060612T124023.2342.  I think keeping the "." is preferable since  
> ISO 8601 says 12:40:23.2342 can be shorted to 124023.2342, but I  
> didn't see mention of 1240232342.
>
> One problem is that ISO 8601 allows you to omit the separators "-"  
> and ":", which would then make it a float in Pd, and therefore it  
> would be truncated to 6 digits.  So we couldn't support that.
>
> Here's a page all about ISO 8601 date/time formats:
>
> http://www.cl.cam.ac.uk/~mgk25/iso-time.html#time
>
> Thoughts? Comments? Flames? ;)
>
> .hc
>
> ---------------------------------------------------------------------- 
> --
>
> I have the audacity to believe that peoples everywhere can have  
> three meals a day for their bodies, education and culture for their  
> minds, and dignity, equality and freedom for their spirits.      -  
> Martin Luther King, Jr.
>
>


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