Quote:
Originally Posted by Adoby
Examine the OPF-files that are stored together with the books.
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That actually works, thanks! But user-defined fields look different from what described in
https://www.mobileread.com/forums/sho...44&postcount=9 may be there is a native way to store such type of metadata.
User-defined field format in opf file (example for doi):
<meta name="calibre:user_metadata:#doi" content="{"is_category": true, "#extra#": null, "kind": "field", "is_custom": true, "is_csp": false, "colnum": 3, "column": "value", "rec_index": 22, "search_terms": ["#doi"], "link_column": "value", "is_multiple2": {}, "is_multiple": null, "datatype": "text", "#value#": "actual_doi_code", "category_sort": "value", "table": "custom_column_3", "is_editable": true, "label": "doi", "display": {"use_decorations": 0}, "name": "DOI"}"/>