Nominal temporal references

Hi Alejandro,

About the Nominal temporal references
<http://w3c.github.io/sdw/UseCases/SDWUseCasesAndRequirements.html#NominalTemporalReferences>
requirement ("It should be possible to refer to time intervals by nominal
temporal references (e.g January, a named event in a calendar, a geological
period, a dynastic period)."): Isn't this already covered by the Temporal
reference system
<http://w3c.github.io/sdw/UseCases/SDWUseCasesAndRequirements.html#TemporalReferenceSystem>
requirement? Some temporal reference systems are numerical, some are
textual, and some may be both. I mean, the way that a time or time interval
is refered to is determined by the temporal reference system, isn't it?

Regards,
Frans

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Frans Knibbe
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