- From: Henry S. Thompson <ht@inf.ed.ac.uk>
- Date: Fri, 04 Jun 2004 10:14:31 +0100
- To: "Xan Gregg" <Xan.Gregg@jmp.com>
- Cc: "Keith Suderman" <keith@suderman.com>, <xmlschema-dev@w3.org>
The Component Constraint you quote is just that, a constraint on
_components_ in _schemas_, and applies to the {max occurs} and {min
occurs} properties.
The XML Representation used in schema _documents_ allows the
_attributes_ maxOccurs and minOccurs to have value 0, but, as noted in
your other quote, this results in no component.
So e.g.
<xs:sequence>
<xs:element name="foo" type="baz" minOccurs="0" maxOccurs="0"/>
<xs:element name="bar" type="xs:string"/>
</xs:sequence>
may occur legally in a schema document, but the corresponding sequence
Particle component will contain only one Element Declaration
component.
Sorry for the confusion.
ht
--
Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
Half-time member of W3C Team
2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
Fax: (44) 131 650-4587, e-mail: ht@inf.ed.ac.uk
URL: http://www.ltg.ed.ac.uk/~ht/
[mail really from me _always_ has this .sig -- mail without it is forged spam]
Received on Friday, 4 June 2004 05:14:46 UTC