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From: aoki@postgres.Berkeley.EDU (Paul M. Aoki)
To: yprj2167@cs.cuhk.hk (Final Year Project)
Cc: postgres@postgres.Berkeley.EDU
Subject: Re: Question about attributes of CLASS 
Reply-To: aoki@postgres.Berkeley.EDU (Paul M. Aoki)
In-reply-to: Your message of Mon, 7 Mar 94 11:39:37 +0800 
	     <9403070339.AA04436@cucs18.cs.cuhk.hk> 
Date: Sun, 06 Mar 94 21:12:08 -0800
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yprj2167@cs.cuhk.hk (Final Year Project) writes:
> What are the restrictions on the name of the attributes of Class ?
> I just found the syntax error if the name of the attributes was not
> started with alphabet. Are there any restrictions ? e.g. length of
> the name , etc. Thanks.

the lex syntax for identifiers (per the code -- always the most reliable 
source of info :-) is:

digit           [0-9]
letter          [_A-Za-z]
letter_or_digit [_A-Za-z0-9]

identifier      {letter}{letter_or_digit}*

this is true for all identifiers, including user names (which, as
"t-ishii" has discovered, is a botch on my part :-/)
--
  Paul M. Aoki  |  CS Div., Dept. of EECS, UCB  |  aoki@postgres.Berkeley.EDU
                |  Berkeley, CA 94720           |  ...!uunet!ucbvax!aoki