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- To: "xml-dev" <xml-dev@lists.xml.org>
- Subject: Rationale Behind The PSVI
- From: "Dare Obasanjo" <dareo@microsoft.com>
- Date: Thu, 16 May 2002 03:21:16 -0700
- Thread-index: AcH8w2lc1TepjdWJR1+KX0JQ9wnBFA==
- Thread-topic: Rationale Behind The PSVI
Title: Message
I know I could just
ask this of our schema folks at MS but I think this deserves public debate. I am
truly curious about the purpose of the PSVI. The XML infoset I can understand
was an attempt to create a baseline data model for XML documents so each spec
wouldn't go ahead and reinvent its own (like we have now with DOM &
XPath).
The PSVI on the
other hand doesn't strike me as useful in that manner. Like the W3C XML Schema
recommendation which spawned it, it conflates many different issues into one
entity including as type information,validation information and default
information. However, the PSVI is designed in a manner that is cumbersome for
anyone to expose fully either in a push or pull based parser model or in an
object model like the DOM or XPath/XQuery.
Secondly it is
difficult, nigh impossible to effectively serialize.
So what exactly is
the point of the PSVI as it stands in the W3C XML Schema recommendation?
PS: Please when
responding don't confuse the concept of an infoset augmented with type
information with the PSVI they are similar but different things.
--
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