  Schema "can I" question...  From: <MarkH@i2.co.uk> Date: Wed,
10 Jan 2001 12:50:56 -0000 Message-ID:
<1E73B637CFC3D411A12F00B0D0795DDD091499@uknts40exh01.i2.co.uk>
To: xmlschema-dev@w3.org As my customization of schemas posting
has mustered no response, I'll focus on the critical aspect and
ask...  1) Can I allow arbitrary (i.e. unanticipated) elements
in a <sequence>? 2) Alongside other specified elements?  For
example (see below), can I write a schema that explicitly
describes <personItem> and <vehicleItem> (and would validate
that instances of these items complied with the schema's type
definition for them), while also allowing <witnessItem> which
does not appear in the schema?  Note: <items> is a collection of
zero or more items from a range of possible types which
represent entities (people, vehicles, buildings etc.) which have
different properties (firstName, lastName etc.).  I want to
define a basic schema structure, but allow people to include
their own types without having to modify the schema. Val