[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: Again wit da AND and Repetitions

  • From: terje@i... (Terje Norderhaug)
  • To: xml-dev@i...
  • Date: Sat, 15 May 1999 13:21:36 -0700

Re: Again wit da AND and Repetitions
At 5:11 PM 5/14/99, roddey@u... wrote:
>>>Does anyone believe that these can be done in less than brute force tree
>search
>>>times?
>>
>>XML requires deterministic content models. This allows validators to do
>>their job without having to look more than one element ahead or do brute
>>force tree searches.
>
>Actually it does not require deterministic models, it just allows you to check
>for them. And, I guess its not really what XML does or does not do that's in
>question here, its what the new upcoming schema spec proposes to do that's at
>issue.

The XML 1.0 specification, 3.2.1 states that:

"For compatability, it is an error if an element in the document can match
more than one occurance of an element type in the content model".

See also Appendix E to the specification, which describes in further detail
what is meant by a deterministic and ambigous content model.

It follows from the definition that a validating XML parser doesn't have to
look ahead. This is important as it simplifies implementing validation.

-- Terje <Terje@i...> | Media Design in*Progress

   Software for Mac Web Professionals at <http://www.in-progress.com>
   Take advantage of XML with Emile, the first XML editor for Mac.



xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i...
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1
To (un)subscribe, mailto:majordomo@i... the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo@i... the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa@i...)


PURCHASE STYLUS STUDIO ONLINE TODAY!

Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
Email
First Name
Last Name
Company
Subscribe in XML format
RSS 2.0
Atom 0.3
 

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.


Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.