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

Re: Well-established uses of processing instructions?

  • To: xml-dev@l...
  • Subject: Re: Well-established uses of processing instructions?
  • From: Rick Jelliffe <ricko@a...>
  • Date: Mon, 09 May 2005 18:48:45 +1000
  • In-reply-to: <200505090824.j498OakL003599@m...>
  • References: <200505090824.j498OakL003599@m...>
  • User-agent: Mozilla Thunderbird 0.6 (X11/20040502)

well established use
Michael Kay wrote:

>I sometimes use processing instructions in a source document as instructions
>to a stylesheet, for example
>One could of course use an element just as well; but that means changing the
>schema/DTD, which one might have no control over.
>This is not really something I would recommend: it's very likely that other
>applications designed to process XML conforming to this schema will fall
>over when they encounter this undocumented PI. But it can be handy all the
Why would they fall over?  Typically unless you specifically do something to
make your application act on PIs, they are stripped or ignored. 

Applications that fall over when they discover a PI they don't 
understand are
improperly written.

But PIs used to generate text are non-portable, and so appropriate for 
that are being pre-processed. Probably what should be used is  entities:

<!ENTITY current-data SYSTEM "http://www.eg.com/dynamic?get-current-date">

because the information is data content.


Rick Jelliffe


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.
First Name
Last Name
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.