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   Re: Naming Rules

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  • From: Chris Maden <crism@oreilly.com>
  • To: xml-dev@ic.ac.uk
  • Date: Tue, 28 Jul 1998 10:25:19 -0400 (EDT)

Christina Portillo

> Thank you for your excellent pointer to an online ISO 8879. It would
> be excellent if a similar thing could be done using the limitations
> and expansions to the tagging ruleset defined by XML.
> The question probably needs the more clarification in order for an
> answer to be put forth.


> The values for upper case A-Z and lower case a-z are not explicitly
> defined for NAMESTRT or NAMECHAR. I assume a default.

You are confusing yourself.

(1) The XML productions for naming are correct as written.

(2) If you want to examine the SGML reasons behind the naming rules,
    you need to understand the name productions.

   [55] name =
          name start character,
          name character*

   [53] name start character =
          LC Letter |
          UC Letter |
          LCNMSTRT |

    So far, so good.  But here's where you're getting tripped up:

   [52] name character =
          name start character |    <== name character is a superset
          Digit |                       of name start character
          LCNMCHAR |

As for A-Z defaults, etc., follow the hyperlinks in my on-line version
of the productions.  SGML is obtuse and complex, but its naming
productions are fairly straightforward.

<!ENTITY crism PUBLIC "-//O'Reilly//NONSGML Christopher R. Maden//EN"
"<URL>http://www.oreilly.com/people/staff/crism/ <TEL>+1.617.499.7487
<USMAIL>90 Sherman Street, Cambridge, MA 02140 USA" NDATA SGML.Geek>

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