Hints for gnome-calendar in main

org.gnome.Calendar.desktop ⚙ amd64

asv-description-para-markup-invalid
org.gnome.Calendar.appdata.xml:623 - ul
This description paragraph contains invalid markup. Currently, only <em/> and <code/> are permitted.
asv-description-para-markup-invalid
org.gnome.Calendar.appdata.xml:447 - ul
This description paragraph contains invalid markup. Currently, only <em/> and <code/> are permitted.
asv-description-para-markup-invalid
org.gnome.Calendar.appdata.xml:609 - ul
This description paragraph contains invalid markup. Currently, only <em/> and <code/> are permitted.
asv-description-para-markup-invalid
org.gnome.Calendar.appdata.xml:438 - ul
This description paragraph contains invalid markup. Currently, only <em/> and <code/> are permitted.
internal-unknown-tag
The generator emitted a tag 'internal-unknown-tag' which is unknown. This is a bug in the metadata generator, please file a bugreport.
internal-unknown-tag
The generator emitted a tag 'internal-unknown-tag' which is unknown. This is a bug in the metadata generator, please file a bugreport.

asv-nonstandard-gnome-extension
org.gnome.Calendar.appdata.xml:413 - kudos
This tag is a GNOME-specific extension to AppStream and not part of the official specification. Do not expect it to work in all implementations and in all software centers.