Attribute names

[mas@xinit.se]

I've read through many RFC's and there are a some attributes that are
represented by two names, one long version and one short verstion e.g:

commonname		cn
surname			sn
givenname		gn
organizationalunitname	ou
organizationalname	o
localityname		l
stateorprovince		st

What names should I use? In my opinion the longer names are better to
use because the names are more descriptive? But, in the slapd
configuration files the shorter names are used and some LDAP clients
I've seen also use the shorter names. 

Are there any standards that describe when to use longer or shorter
names (maybe some RFC)?

Kind regards
/Martin Sigbjörn, Arrowhead AB