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asv-cid-desktopapp-is-not-rdns
:4 - accerciser.desktop
The component ID is not a reverse domain-name. Please update the ID to avoid future issues and be compatible with all AppStream implementations. You may also consider to update the name of the accompanying .desktop file to follow the latest version of the Desktop-Entry specification and use a rDNS name for it as well. In any case, do not forget to mention the new desktop-entry in a <launchable/> tag for this component to keep the application launchable from software centers and the .desktop file data associated with the metainfo data.
asv-screenshot-no-media
:201 -
A screenshot must contain at least one image or video in order to be useful. Please add an <image/> to it.

asv-id-tag-has-type
:4 - accerciser.desktop
The <id/> tag still contains a `type` property, probably from an old conversion to the recent metainfo format.
asv-cid-missing-affiliation-gnome
:4 - accerciser.desktop
The component is part of the GNOME project, but its ID does not start with GNOMEs reverse-DNS name ("org.gnome").
asv-unknown-tag
:203 - updatecontact
Found invalid tag. Non-standard tags should be prefixed with `x-`. AppStream also provides the <custom/> tag to add arbitrary custom data to metainfo files. This tag is read by AppStream libraries and may be useful instead of defining new custom toplevel or `x-`-prefixed tags if you just want to add custom data to a metainfo file.
asv-desktop-app-launchable-omitted
-
This `desktop-application` component has no `desktop-id` launchable tag, however it contains all the necessary information to display the application. The omission of the launchable entry means that this application can not be launched directly from installers or software centers. If this is intended, this information can be ignored, otherwise it is strongly recommended to add a launchable tag as well.