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

Re: Internal entities removed from XML?


Re:  Internal entities removed from XML?
From: "Mike Champion" <mc@x...>


> On Fri, 20 Dec 2002 06:05:08 +1100, Rick Jelliffe <ricko@a...> 
> wrote:
> 
> > What are these optimizations?
> 
> The best I can do is point to http://lists.w3.org/Archives/Public/www- 
> tag/2002Dec/0119.html, which is the official XMLP WG response to the 
> question of why SOAP 1.2 forbids DTD internal subsets.
> 
> "Primarily, the
> reasons are (a) performance and (b) keep it simple.  In the high
> performance regimes where some SOAP implementations will operate, the
> parsers will likely be tuned for SOAP message handling.  Doing general
> entity substitution beyond that mandated by XML 1.0 (e.g. &lt;) implies a
> degree of buffer management, often data copying, etc. which can be a
> noticeable burden when going for truly high performance.  This performance
> effect has been reported by workgroup members who are building high
> performance SOAP implementations."

They seem to be saying that documents with entities are slower to process
(which well may be so for some implementations) and so therefore these should 
be banned. This puts the cart before the horse: if someone wants to send
superfast data, let them send resolved data.   I don't see anything in those
comments that supporting entities but not using them imposes any 
performance penalty. 

Cheers
Rick Jelliffe

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.