[ebxml-cppa] Use of Name versus NMTOKEN

[Arvola Chan <arvola@tibco.com>]

It seems that our use of the NMTOKEN data type in the CPP/A schema is not
quite correct. (Please see enclosed message from Anli Shundi.) We should use
the Name data type instead. I intend to incorporate this change into the
1.04 draft unless anyone objects.

The difference between Name and NMTOKEN is as follows:

[Definition: A Name is a token beginning with a letter or one of a few
punctuation characters, and continuing with letters, digits, hyphens,
underscores, colons, or full stops, together known as name characters.]
Names beginning with the string " xml", or any string which would match
(('X'|'x') ('M'|'m') ('L'|'l')) , are reserved for standardization in this
or future versions of this specification.

Note:

[E98]The Namespaces in XML Recommendation [XML Names] assigns a meaning to
names containing colon characters. Therefore, authors should not use the
colon in XML names except for namespace purposes, but XML processors must
accept the colon as a name character.

An Nmtoken (name token) is any mixture of name characters.

Names and Tokens
[4]     NameChar    ::=     Letter | Digit | '.' | '-' | '_' | ':' |
CombiningChar | Extender
[5]    Name    ::=    (Letter | '_' | ':') ( NameChar)*
[6]    Names    ::=    Name (#x20 Name)*  /* [E62] */
[7]    Nmtoken    ::=    (NameChar)+
[8]     Nmtokens    ::=     Nmtoken (#x20 Nmtoken)* /

Whereas a NMTOKEN may start with a digit, a Name cannot start with a digit.
-Arvola

-----Original Message-----
From: Anli Shundi <ashundi@tibco.com>
To: 'Arvola Chan' <arvola@tibco.com>
Cc: Xan Gregg <xan@tibco.com>; Ismail Suayah <ismail@tibco.com>
Date: Friday, January 11, 2002 10:21 AM
Subject: using NMTOKEN for element content in cpp-cpa-1_1.xsd


>Hi,
>
>I validated by chance cpp-cpa-1_1.xsd regarding non-deterministic warning
>and our validator warns also:
>
>Warning: in element "ReliableMessaging" in namespace
>"http://www.oasis-pen.org/committees/ebxml-cppa/schema/cpp-cpa-1_1.xsd":
>   in element "MessageOrderSemantics" in namespace
>"http://www.oasis-open.org/committees/ebxml-cppa/schema/cpp-cpa-1_1.xsd":
>   element "MessageOrderSemantics" in namespace
>"http://www.oasis-open.org/committees/ebxml-cppa/schema/cpp-cpa-1_1.xsd":
> type "NMTOKEN" is reserved for attribute use only and is here for
>compatibility with XML 1.0 (Second Edition)
>
>The warning comes because you're using the type for element content
>rather than for an attribute.  I would suggest using XMLSchema's "Name".
>It differs by NMTOKEN by restricting the first character.
>http://www.w3.org/TR/xmlschema-2/#terminology
>http://www.w3.org/TR/xmlschema-2/#Name
>http://www.w3.org/TR/xmlschema-2/#NMTOKEN
>
> <simpleType name = "messageOrderSemantics.type">
> <restriction base = "NMTOKEN">
> <enumeration value = "Guaranteed"/>
> <enumeration value = "NotGuaranteed"/>
> </restriction>
> </simpleType>
>
>
>Anli Shundi                      ashundi@tibco.com
>Senior Developer                 office: (919) 969-6518
>TIBCO Software Inc.              mobile: (919) 672-5934
>
>www.extensibility.com  |  www.XMLschema.com  |  www.tibco.com
>
>

draft-cpp-cpa-09.xsd