Leading and Trailing Spaces

["Lon Tierney" <ltierney@mykungfuisthebest.net>]

I can't seem to find anything in the RFCs that state if leading or
trailing spaces in attribute values are allowed. The only thing I can find
is in RFC 2849 (LDIF) which says that values ending in a space should be
base64 encoded.

Is it dependent on the particular syntax? If so, would they be allowed in
a Directory String?

Thanks,
-lon