user id question

[john doe]

Hi,

I'm in the process of creating a gpg key, I have one question though:
Some time I use the name x and sometime I use a shorter form of that
name but the e-mail address is the same.

EG:

first-name last-name <first-name.last-name at example.com>
short-name <first-name.last-name at example.com>

Is it acceptable to have multiple 'user ID's with the same address e-mail?

--
John Doe