(note that the origin\a\ is not included; we shouldn't discriminate between cache and origin for the data_id, and don't need the topic-hierarchy version identifier a).
Useful to add a note to the Guide on choosing a unique identifier for the data_id and illustrate how WIS2box does it, as above.
The WIS2 Notification Message spec says that
data_idmust be unique, but there's no guidance on how data publishers might do this.WIS2box made a choice to append a locally unique "file" identifier onto (most of) the topic hierarchy, for example:
wis2/hk-hko-swic/data/core/weather/advisories-warnings/ury/00-6804254d609d389f811d069a0dcbc9b1.xml(note that the
origin\a\is not included; we shouldn't discriminate between cache and origin for the data_id, and don't need the topic-hierarchy version identifiera).Useful to add a note to the Guide on choosing a unique identifier for the
data_idand illustrate how WIS2box does it, as above.