• From: John Cowan <cowan@l...>
• To: XML Dev <xml-dev@i...>
• Date: Fri, 07 Aug 1998 11:48:39 -0400

Peter Jones wrote:

> <!NOTATION  avi  SYSTEM "C:\mydir\aviplay.exe" >
> <?avi  holidays.avi?>

That would be better managed with an unparsed entity and this DTD:

<!-- declares avi notation: note that system ids are URIs -->
<!NOTATION avi SYSTEM "file:///C:/mydir/aviplay.exe">

<!-- declares unparsed entity -->
<!ENTITY Holidays SYSTEM "holidays.avi" NDATA avi>

<!-- declare useful element -->
<!ELEMENT Play-it EMPTY>
<!ATTLIST Play-it
	what	ENTITY	#REQUIRED>

and then in the document instance:

<Play-it what="Holidays"/>

> Is this the sort of thing?

A better use for PIs is to instruct programs that filter or otherwise
interpret XML.  For example, there is a (non-standard) PI for
attaching a stylesheet to a document for rendering purposes:
architectural forms processing (which is essentially a scheme
for mapping idiosyncratic elements or attributes into ones defined
by a standard called an "architecture) use a PI to name the
architecture and give useful details about it, etc. etc.

-- 
John Cowan	http://www.ccil.org/~cowan		cowan@c...
	You tollerday donsk?  N.  You tolkatiff scowegian?  Nn.
	You spigotty anglease?  Nnn.  You phonio saxo?  Nnnn.
		Clear all so!  'Tis a Jute.... (Finnegans Wake 16.5)

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/
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...)

• References:
  • P.I's
    • From: Peter Jones <peterj@w...>

• Prev by Date: Re: Namespaces: silly question
• Next by Date: Re: Processing instructions
• Previous by thread: P.I's
• Next by thread: Questions on schema and other XML issues
• Index(es):
  • Date
  • Thread