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Re: XML Schemas

• To: Michael Kay <mike@s...>
• Subject: Re: XML Schemas
• From: Robert Koberg <rob@k...>
• Date: Thu, 27 Oct 2005 14:20:09 -0400
• Cc: xml-dev@l...
• In-reply-to: <200510271808.j9RI80g20026@s...>
• References: <200510271808.j9RI80g20026@s...>
• User-agent: Mozilla Thunderbird 1.0 (Macintosh/20041206)

Michael Kay wrote:
>>Does that mean that you would never beable to write a schema 
>>for xhtml?
> 
> 
> Of course you can write a schema for XHTML. But there are very few
> real-world vocabularies where ALL the rules can be expressed in a schema,
> and more than all the rules for a programming language can be expressed in
> its BNF.
> 

The problem I have with XML Schema and XHTML is with xml editors 
(software, not people). Say someone wants to create an FAQ. It must 
contain a question and an answer, like:

<div class="faq">
  <div class="question">
   <p>This is a question p1</p>
   <p>p2</p>
  </div>
  <div class="answer">
   <ol>
    <li>some answer part 1</li>
    <li>some answer part 2</li>
   </ol>
  </div>
</div>

there is no way to validate this with XML Schema. It is also why we use 
XML instead of XHTML in our editor (Xopus).

I wish there was a good browser based, cross platform XML WYSIWYG editor 
that uses RNG... - So I could use XHTML but keep it /valid/. As it 
stands today, Xopus is the best choice. Anybody know of something that 
competes?

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    • From: Martin Probst <martin@x...>

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