xml-dev - XSchema Question 5: Root element issues

["Simon St.Laurent" <SimonStL@classic.msn.com>]

We'll start the XSchema document syntax discussion at the top, with the root 
element. Hopefully this piece will be a nice appetizer and we can proceed to 
its subelements and attributes, the main course.

>From the Goals:
--------------------
1. XSchema documents shall use XML document syntax, using element nesting and 
attributes to describe all constraints that may be verified by a processor 
using XSchema. 
--------------------

In XML documents, per 2.1 of the XML specification:
--------------------
There is exactly one element, called the root, or document element, no part of 
which appears in the content of any other element.  
--------------------

XSchema documents, in order to be XML documents, must have a single root 
element, which may be preceded by the prolog, PIs, and perhaps comments and 
XML 1.0 DTD information.

An XSchema document might begin:
<?xml version='1.0' ?>
<?xml:namespace ns='http://tobedetermined.com' prefix='XSC' ?>
<XSC:XSchema>
...
</XSC:XSchema>

Do we want to provide additional information in this root element regarding 
XSchema version, for instance? 

We could add "version='0.1'" or something.

Given that we're discussing verifying fragments, it's mildly ironic to be 
requiring a root element.  Any concerns on that issue?

Most important, am I forgetting anything critical?

Simon St.Laurent
Dynamic HTML: A Primer / XML: A Primer / Cookies


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