What is instanceID

Technical Support
1

Hi community,
I’m confused about the meaning of the instanceID, so I need your help.
In docs with doc.type == ‘data_record’ I found a fields.meta.instanceID containing a string with a format like uuid:value
I’ve tried to look for a doc with doc._id == value but such a doc does not exist
what is the uuid in this json key, fields.meta.instanceID ?
could you explain me the meaning of this uuid ?

2

According to the ODK XForms specification, instanceID is:

  • The unique ID of the record
  • string
  • concatenation of ‘uuid:’ and uuid()

It’s different from the document’s UUID i.e. document._id used by the CHT app.

3

Hi, Thanks for this answer
so each data submission has an instanceID and once this submissions is in the couchdb the couchdb doc has its doc._id