spelling: "labeled"

And it feels odd to say "labeled into". I know we sometimes say "tagged into", but I'm not sure that's correct either.
Why do you switch from calling it "a tagged set of images" and then instead of tagging it, you label it ("images can be labeld" (sic))? I think the verb "label" should be avoided since we don't have a Docker command for "label". 

What do you think about this? 

Images can be associated with a repository by tagging them with an image name. You can tag an image at three different times: 

1. at build time (e.g. ``sudo docker build -t IMAGENAME``), 
2. when committing a container (e.g. ``sudo docker commit CONTAINERID IMAGENAME``) or 
3. when tagging an image id with an image name (e.g. ``sudo docker tag IMAGEID IMAGENAME``).

A single image may have many IMAGENAMEs.

Then you can define an image name as *[[hostname[:port]][/user/]]name[:tag]*. We could call the full format with no defaults the "Fully Qualified Image Name (FQIN)." Or I'm open to suggestions.

Part of the problem with documenting the ideas around naming is that the FQIN may not reflect reality. Image/repo tagging just creates an *alias* to the image ID. That is, until you actually ``docker push``, you may have an image or repository locally called *repo.example.com:666/metalivedev/isawesome* but repo.example.com doesn't have a copy of it. The "fully-qualified" part is a lie until you ``push``. And even then, if someone else pushes the same FQIN, their "latest" tag and yours will not be the same.