relations for collections missing

[acwittmann]

Hi Robert,
would it be possible to also get the relations (related literature) for collections (previously parents)?
When I do e.g.
ds = pg.PanDataSet(839065) # Is child dataset
ds.relations
[{'id': 'ref66016',
'title': 'Late Holocene primary productivity and sea surface temperature variations in the northeastern Arabian Sea: Implications for winter monsoon variability',
'uri': 'https://doi.org/10.1002/2013PA002579',
'type': 'Related to'}]

However:
dn = pg.PanDataSet('10.1594/PANGAEA.839067') # Is parent record.
dn.relations
[]

Thanks!
Astrid

[fspreck-indiscale]

This doesn't seem to be caused by collections, cf https://doi.pangaea.de/10.1594/PANGAEA.957900:

from pangaeapy.pandataset import PanDataSet
ds = PanDataSet("https://doi.pangaea.de/10.1594/PANGAEA.957900")
print(ds.relations)

prints

[{'id': 'ref118074',
  'title': 'Regional and global impact of CO2 uptake in the Benguela Upwelling System through preformed nutrients',
  'uri': 'https://doi.org/10.1038/s41467-023-38208-y',
  'type': 'Supplement to'},
 {'id': 'ref118076',
  'title': 'DSHIP Landsystem',
  'uri': 'http://dship.bsh.de/',
  'type': 'Source'},
 {'id': 'ref115066',
  'title': 'Methods of Seawater Analysis: Third, Completely Revised and Extended Edition',
  'uri': 'https://doi.org/10.1002/9783527613984',
  'type': 'References'}]

https://doi.pangaea.de/10.1594/PANGAEA.839067 doesn't have a relation but a supplement to in the citation, so in your example, while dn.relations is empty, dn.supplement_to should show

{'id': 'ref66016',
 'title': 'Late Holocene primary productivity and sea surface temperature variations in the northeastern Arabian Sea: Implications for winter monsoon variability',
 'uri': 'https://doi.org/10.1002/2013PA002579',
 'year': '2014'}

You are the experts on this, this is probably because of a datamodel change in PANGAEA? Maybe old datasets have the supplement to in their citations, new ones in their relations? In my example, df.supplement_to is empty. This is of course a bit confusing when using pangaeapy to extract the supplement to information (and probably any other tool relying on the panmd representation). @huberrob Do you think it makes sense to set PanDataset.supplement_to to the relation with "type": "Supplement to" if there is one and it would be empty otherwise?

[huberrob]

Yes this is not a collection issue. Such information most probably is not available for all datasets/collections during the curation process and thus missing.

And @fspreck-indiscale I agree that supplements should be added to the relations dict as you propose.