[Tagging] opening_hours and related tags: hours past 24:00

[Tod Fitch]

> On Oct 17, 2021, at 7:56 AM, Snusmumriken <snusmumriken.mapper at runbox.com> wrote:
> 
> On Sun, 2021-10-17 at 12:25 +0200, Simon Poole wrote:
>> 
>> Am 17.10.2021 um 08:13 schrieb Snusmumriken:
>>> ...
>>> Could you explain why a mapper should do an abstraction from what
>>> is
>>> posted on a sign? Given that a value like Fr-Sa 21:00-05:00 is
>>> without
>>> ambiguity.
>>> 
>> Because the contents of an opening hours tag are based on a highly
>> formalized grammar, just adding an extra day with different hours
>> already requires you to know that grammar. It could be argued that
>> that
>> is the case even for your super simple example, for example that
>> leading
>> zeros are in principle required in times, that the weekday
>> identifiers
>> are two letter English abbreviations and so on. But as I already
>> pointed
>> out you are mixing up internal representation with data entry and
>> display.
> 
> Could I ask, do you consider Fr-Sa 21:00-05:00 to be ambiguous? If not,
> I haven't really heard (or perhaps understood) any argument why one
> should deviate from what's on a posted sign and arguably stands for the
> Ground Truth. Sure one could have an internal representation that's
> different from the Ground Truth but I think there has to be a really
> strong rational for doing that. And so far I haven't heard any.
> 
You quoted the strong rational: The value of the opening hours tag has a formal grammar. Formal grammar is important for machine interpretation of the value.


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