Processing instructions (was XSchema: Sections 5.0 and 5.1)

[david at megginson.com]

John Cowan writes:

 > PIs are extremely useful when adding information to documents with
 > frozen DTDs.  For example, the proposed "xml:stylesheet" PI allows you
 > to attach a stylesheet to any XML document without having to
 > tamper with the document's DTD (as by adding a STYLE element
 > or attribute).
 > 
 > I can't see designing a new document type and using PIs, though.
 > As you say, elements or attributes do the work.

PI's provide a (slightly clumsy) method for adding new declaration
types to XML without breaking existing parsers.  In general, I don't
think that it's a good idea to use elements and attributes for
declarations, since they represent the logical structure of the
document itself.


All the best,


David

-- 
David Megginson                 david at megginson.com
           http://www.megginson.com/

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev at ic.ac.uk
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/
To (un)subscribe, mailto:majordomo at ic.ac.uk the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo at ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa at ic.ac.uk)