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- From: Robin LaFontaine <robin@monsell.co.uk>
- To: ht@cogsci.ed.ac.uk (Henry S. Thompson), glen.albert@autodesk.com
- Date: Mon, 10 Jul 2000 15:10:52 +0100
Henry,
A related question: is it possible in XML Schema to distinguish
between the case where the order of the element instances is
important (significant) and where it is not?
For example, clearly for a list of points denoting a shape, the order
of the points is important. But for a set of points representing
possible target positions, the order is not important.
Another example: in XML Schema the definition of the elements in a
choice can be given in any order, but in a sequence the order is
significant.
This distinction is very important in many data files and it would be
good to be able to indicate this in an XML Schema, but I do not think
it is possible.
Robin
At 11:22 am +0100 10/7/00, Henry S. Thompson wrote:
>If I understand your design correctly, what you need is
>
> <element name="CoordGeom">
> <complexType>
> <choice minOccurs="0" maxOccurs="unbounded>
> <element ref="Line"/>
> <element ref="Curve"/>
> <element ref="Spiral"/>
> </choice>
> </complexType>
> </element>
>
>ht
>--
> Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
> W3C Fellow 1999--2001, part-time member of W3C Team
> 2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
> Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk
> URL: http://www.ltg.ed.ac.uk/~ht/
>
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-- -----------------------------------------------------------------
Robin La Fontaine, Monsell EDM Ltd
(R&D Project Management, Engineering Data Exchange using XML, EDIF)
Tel: +44 1684 592 144 Fax: +44 1684 594 504 or +44 870 054 2811
Email: robin@monsell.co.uk http://www.monsell.co.uk
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