Why is konqueror my x-www-browser when it doesn't provide it?

[Nunya <31210.nospam@comcast.net>]

On my machine:

# update-alternatives --display x-www-browser
x-www-browser - status is auto.
 link currently points to /usr/bin/konqueror
/usr/bin/konqueror - priority 100
Current `best' version is /usr/bin/konqueror.

But:
$ grep-available -FProvides x-www-browser
<nothing>

Why is konqeror my x-www-browser when it doesn't "Provide" it?