The name of this package suggests that it is a documentation package. It is usually not desirable for documentation packages to depend on the packages they document, because users may want to install the docs before they decide whether they want to install the package. Also, documentation packages are often architecture-independent, so on other architectures the package on which it depends may not even exist.
The tag is present in Lintian version
That is the most recent version we know about.
We use semantic versions.
The patch number is a commit step indicator relative to the
release tag in our Git
You can find the detection logic for this version at commit ce6249d. For merge requests, please use the latest version in the Lintian check fields/package-relations.