[DNSB]

Originally Posted by geek1011

Can I see an example of the OPF meta tag for that? Based on skimming the Calibre source code, I think I'll need to parse calibre:user_metadata:#subtitle as JSON, then get the string #value#, but I want to confirm that.

Here's some samples, the first two are from epub2 files, the next two are from an epub3. It could have been harder to read if someone had really tried.

Spoiler:

<meta content="{&quot;rec_index&quot;: 29, &quot;name&quot;: &quot;Subtitle&quot;, &quot;colnum&quot;: 8, &quot;is_multiple2&quot;: {}, &quot;kind&quot;: &quot;field&quot;, &quot;label&quot;: &quot;subtitle&quot;, &quot;column&quot;: &quot;value&quot;, &quot;category_sort&quot;: &quot;value&quot;, &quot;search_terms&quot;: [&quot;#subtitle&quot;], &quot;is_category&quot;: true, &quot;is_editable&quot;: true, &quot;is_csp&quot;: false, &quot;is_multiple&quot;: null, &quot;display&quot;: {&quot;description&quot;: &quot;&quot;, &quot;use_decorations&quot;: 0}, &quot;#extra#&quot;: null, &quot;#value#&quot;: &quot;Under the Ocean for Sunken Treasure&quot;, &quot;table&quot;: &quot;custom_column_8&quot;, &quot;link_column&quot;: &quot;value&quot;, &quot;is_custom&quot;: true, &quot;datatype&quot;: &quot;text&quot;}" name="calibre:user_metadata:#subtitle" />

<meta name="calibre:user_metadata:#subtitle" content="{&quot;table&quot;: &quot;custom_column_8&quot;, &quot;display&quot;: {&quot;description&quot;: &quot;&quot;, &quot;use_decorations&quot;: 0}, &quot;label&quot;: &quot;subtitle&quot;, &quot;column&quot;: &quot;value&quot;, &quot;colnum&quot;: 8, &quot;#value#&quot;: &quot;A Sector General Omnibus&quot;, &quot;category_sort&quot;: &quot;value&quot;, &quot;datatype&quot;: &quot;text&quot;, &quot;is_editable&quot;: true, &quot;rec_index&quot;: 29, &quot;search_terms&quot;: [&quot;#subtitle&quot;], &quot;is_multiple2&quot;: {}, &quot;link_column&quot;: &quot;value&quot;, &quot;#extra#&quot;: null, &quot;is_category&quot;: true, &quot;is_multiple&quot;: null, &quot;kind&quot;: &quot;field&quot;, &quot;name&quot;: &quot;Subtitle&quot;, &quot;is_custom&quot;: true, &quot;is_csp&quot;: false}" />

  "#subtitle": {
    "#extra#": null, 
    "#value#": "An Oral History of the Zombie War", 
    "category_sort": "value", 
    "colnum": 10, 
    "column": "value", 
    "datatype": "text", 
    "display": {
      "description": "", 
      "use_decorations": 0
    }, 
    "is_category": true, 
    "is_csp": false, 
    "is_custom": true, 
    "is_editable": true, 
    "is_multiple": null, 
    "is_multiple2": {}, 
    "kind": "field", 
    "label": "subtitle", 
    "link_column": "value", 
    "name": "Subtitle", 
    "rec_index": 29, 
    "search_terms": [
      "#subtitle"
    ], 
    "table": "custom_column_10"
  }

    <dc:title id="subtitle">An Oral History of the Zombie War</dc:title>