[TYPO3-ect] ext registration: name/description

[Michael]

Hi!

If you register a new extension at http://typo3.org, you have to enter
the ext key, name, description, etc.

I wonder what the purpose of these data is (name, description) and 
where
this is used again? My understanding is that all information about an
extension shown at TER and in the EM come from the file 
"ext_emconf.php"
which is created/updated when you transfer/install the ext.

I also wonder how you can edit the data entered afterwards. Sometimes
the scope changes during development, another name should be assigned
or you want to correct a typo.

Thanks
Michael