Me again. Sorry to be flooding the forum today.

Do you think it's worth considering using GeoJSON for location information in the JSON documents?

http://geojson.org/geojson-spec.html

Would be fairly easy to add some extra elements to the JSON documents using this spec:

http://geojson.org/geojson-spec.html#id2

Just a suggestion, so feel free to tell me to go away!

Alan, thanks for this interesting pointer. The more standards we use the better, so we'll be sure to communicate your suggestion to the interested parties.

Just a little follow up. I found this GeoJSON validator, which might be useful: http://geojsonlint.com

You can also grab the source code for it and set up a local installation: https://github.com/JasonSanford/geojsonlint.com

Thank you Alan, a very convenient tool indeed.

An approach could be adding some kind of manifest file to any dataset, whatever the format.
That's basically what the Citadel-JSON do, if we strip the "poi" and "attribute" parts...