Missing Embedded Metadata in EPUBs

daemonblade · 06-12-2017, 03:07 AM

Once upon a time, Calibre used to embed additional metadata on the oebps-package file (ie: the rootfile referenced file). In particular, stuff like:

<meta name="calibre:title_sort" content="Name of a Book"/>
<meta name="calibre:series" content="The Series Name"/>
<meta name="calibre:series_index" content="1.0"/>
<meta name="calibre:author_link_map" content="{"Some Author": ""}"/>

My Kobo reader recognised the additional metadata and displayed the name of the series just underneath the title.

However, recent releases of Calibre do not do this anymore. The only remnant left is the "calibre:author_link_map".

Did I miss some checkbox somewhere? Or has the feature been disabled/removed?

davidfor · 06-12-2017, 04:19 AM

Sorry, the Kobo ereaders have never read the series information or any other calibre metadata attribute.. The series info can display it, but it has to come from somewhere else. The series info can be populated by the driver. Each time you connect a Kobo device, it checks the series info and updates it. There is an option in the KoboTouch driver to enable this.

For the title and author, they come from "dc:title" attribute and the first "dc:creator" attribute. If you were seeing the sort versions of the author or title, then you were probably using a metadata plugin to change these values.

If you have swapped between the built-in KoboTouch driver and the extended driver, you need to check the configuration as these options are not shared.

06-12-2017, 03:07 AM	#1
daemonblade Junior Member Posts: 7 Karma: 10 Join Date: Jun 2017 Device: Kobo	Missing Embedded Metadata in EPUBs Once upon a time, Calibre used to embed additional metadata on the oebps-package file (ie: the rootfile referenced file). In particular, stuff like: <meta name="calibre:title_sort" content="Name of a Book"/> <meta name="calibre:series" content="The Series Name"/> <meta name="calibre:series_index" content="1.0"/> <meta name="calibre:author_link_map" content="{"Some Author": ""}"/> My Kobo reader recognised the additional metadata and displayed the name of the series just underneath the title. However, recent releases of Calibre do not do this anymore. The only remnant left is the "calibre:author_link_map". Did I miss some checkbox somewhere? Or has the feature been disabled/removed?

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06-12-2017, 04:19 AM	#2
davidfor Grand Sorcerer Posts: 24,907 Karma: 47303748 Join Date: Jul 2011 Location: Sydney, Australia Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos	Sorry, the Kobo ereaders have never read the series information or any other calibre metadata attribute.. The series info can display it, but it has to come from somewhere else. The series info can be populated by the driver. Each time you connect a Kobo device, it checks the series info and updates it. There is an option in the KoboTouch driver to enable this. For the title and author, they come from "dc:title" attribute and the first "dc:creator" attribute. If you were seeing the sort versions of the author or title, then you were probably using a metadata plugin to change these values. If you have swapped between the built-in KoboTouch driver and the extended driver, you need to check the configuration as these options are not shared.