Lintian tag information: appstream-metadata-legacy-format (type: error)

Description (from lintian-explain-tags)

The AppStream metadata contains the obsolete root node <application>. It
was used in a legacy format. The application metadata for your package
should follow the new format described on freedesktop.org.

You can validate draft formats with 'appstreamcli validate'.

Please refer to https://wiki.debian.org/AppStream/Guidelines and
https://www.freedesktop.org/software/appstream/docs/chap-Metadata.html#sect-Metadata-GenericComponent
for details.

Visibility: error
Show-Always: no
Check: appstream-metadata

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