[
Lists Home |
Date Index |
Thread Index
]
- To: "David Carlisle" <davidc@nag.co.uk>
- Subject: RE: [xml-dev] [schema] which assertions can't you express ?
- From: "Cross, Neal - Senior Developer" <ncross@icc.co.uk>
- Date: Wed, 8 Sep 2004 15:14:51 +0100
- Cc: <xml-dev@lists.xml.org>
- Thread-index: AcSVrJcbvYYimu43RS6rm4cjojopRwAACRyg
- Thread-topic: [xml-dev] [schema] which assertions can't you express ?
Ahh, thank you David, I got lumbered with this legacy XML and we currently only have an Excel spreadsheet to define the structure :-(
I will look into your suggestions.
-----Original Message-----
From: David Carlisle [mailto:davidc@nag.co.uk]
Sent: 08 September 2004 14:58
To: Cross, Neal - Senior Developer
Cc: xml-dev@lists.xml.org
Subject: Re: [xml-dev] [schema] which assertions can't you express ?
> Now, how do I create a schema to represent this considering that is is
> indexed by the attribute value of id?
w3c xml schema can't really do anything about that as it can't express
different content models for section elements depending on its id
attribute, but Relax NG or schematron (for example) could be used to
express constraints on such a document type.
even w3c schem can express some things, it can't base the content model
of child elements based on the attribute value but it can base it on its
possition in the hierarchy, so you could for example state that the top
level section has to have id="report definition" and that its section
children have to have id="officers" or ... and that their section children
have to have ids "name" or "appointment date" etc.
You couldn't though express requirements such as
<section id="name"/> comes before <section id="date of birth"/>
in W3C schema, unlike relax ng or schematron.
David
________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________
#####################################################################################
This e-mail message has been scanned for Viruses and Content.
BOSS
#####################################################################################
|
