The 'Source' field in DEP 5

[Akbarkhon Variskhanov <akbarkhon.variskhanov@gmail.com>]

Hi.

I know that this format is optional but I was wondering what exactly
this field is expected to include. In my interpretation, it's a URL to
a directory containing upstream tarballs, say
https://www.example.com/src/download. However, I've also seen people
put links to upstream Git repositories. Which one is closer to the
definition and is preferred over the other? Technically, *the* source
is the Git repository but if we're talking about packaged releases,
tarball is the source to which the current debian/copyright file
applies. It seems to me that both interpretations may be deemed valid.
Was that intentional? Could you perhaps clarify it a little bit?

Many thanks.

Regards,
Akbar.