Hello Simone Sola,
if you just want to delete or flag duplicates, you can use Workflow or Autoindex for that.
Check the documentation here:
Find Duplicates with Autoindex or
Find Duplicates with Workflow
If you need the API, refer to the documentation over at
developer.docuware.com and the Platform description on your DocuWare Server:
https://{DocuWareServer}/DocuWare/Platform/
Using the Endpoint /DocuWare/Platform/FileCabinets/ allows you to retrieve information about all file cabinets the currently logged-in user has access to.
Then you can use /DocuWare/Platform/FileCabinets/{FileCabinetGUID}/ to retrieve information about a single file cabinet, including all existing index fields in this cabinet (which the user has access to).
I am assuming here that by the term
custom-made fields in the DB you mean the index fields of a given file cabinet.
Hope that helps.
Greetings from Germany,
Simon H. Hellmann
DocuWare System Consultant