I'm looking for a suitable document management system for a while. There is one feature I would like to have, I didn't find anywhere except maybe in $$$ enterpr

I'm looking for a suitable document management system for a while. There is one feature I would like to have, I didn't find anywhere except maybe in $$$ enterprise systems: I want to add custom metadata to documents by categories/tags/folders, for example like this: Invoice {issued: date, invoiceNumber: string, amount: number, due: date} Contract { validFrom: date, renewsAt: date, autoRenew: boolean} When adding a tag like this, it should either automatically fetch this information from the content document (probably very hard) or give you a manual workflow to type it into a form, while showing the document next to it. Maybe just by selecting the text from the PDF. In the folder list and in the search you would be able to add those meta data information as columns, sort them by value or do queries (tag:invoice AND invoice.amount > 1000) Edit: this feature seems to be one of most upvoted feature requests for paperless https://github.com/paperless-ngx/paperless-ngx/discussions/141 https://github.com/paperless-ngx/paperless-ngx/discussions/1...