A way to distinguish between OSM field and non-OSM fields in data output

[spwoodcock]

Is your feature request related to a problem? Please describe.

• If we collect lots of data for a project, but not all of it is appropriate for OSM, we need a way to flag that.
• It can become a bit of a mess if we dump all of the field data into OSM, when it may no belong there.

Describe the solution you'd like

• Option 1: Perhaps a flag in the XLSForm to distinguish OSM from non-OSM fields (more manual / configurable).
• Option 2: A listing of OSM tags somewhere (osm-fieldwork?) so that we know what XLSForm fields map directly to OSM tag names (more automatic). I think this is already somewhat in place in osm-fieldwork.
• Other ideas?