- From: Eve L. Maler <eve.maler@sun.com>
- Date: Wed, 17 Apr 2002 13:29:26 -0400
- To: xml-editor@w3.org
-------- Original Message --------
Subject: An Errata for XML spec
Date: Thu, 18 Apr 2002 00:53:10 +0800
From: ¹ù¦Ñ®v <htliaw@mail.im.tku.edu.tw>
To: <tbray@textuality.com>
CC: <jeanpa@microsoft.com>, <cmsmcq@uic.edu>, <eve.maler@east.sun.com>
Dear Editors,
In studying the Specification of XML languages in
[http://www.w3.org/TR/2000/REC-xml-20001006]
, I found some problem.
In production rule
[43] content ::= CharData ?
(
(element | Reference | CDSect | PI | Comment )
CharData ?
)*
, the non-terminal CharData is optional.
However, in production rule
[14] CharData ::= [^<&]* - ([^<&]* ']]>' [^<&]*)
, we can find that the non-terminal CharData is nullable.
It implies that the two '?'s is not necessary in production rule [43].
More worse, they will causes the grammar to be ambiguous.
I recommend that the production rule [43] should be modified as
content ::= ( element | Reference | CDSect | PI | Comment | CharData )*
sincerely yours,
Heh-Tyan Liaw
Associate Prof.,
Tamkang University,
Taiwan
--
Eve Maler +1 781 442 3190
Sun Microsystems XML Technology Center eve.maler @ sun.com
Received on Wednesday, 17 April 2002 13:29:03 UTC