observation_reference: where to store
Where should the reference to an observation be stored in the gridfs files?
Currently there are two ways we do it:
![Selection_035](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
and:
![Selection_036](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
One of these or a mixture eg:
Should be the standard
Also these standards should be written down, stored and ideally used for building the entries