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consider this:
<xsd:complexType name="timeframeType">
<xsd:choice>
<xsd:group ref="both"/>
<xsd:group ref="oneorother"/>
</xsd:choice>
</xs:complexType>
<xsd:group name="both">
<xsd:sequence>
<xsd:element ref="earliestdate"/>
<xsd:element ref="latestdate"/>
</xsd:sequence>
</xsd:group>
<xsd:group name="oneorother">
<xsd:choice>
<xsd:element ref="earliestdate"/>
<xsd:element ref="latestdate"/>
</xsd:choice>
</xsd:group>
-----Original Message-----
From: Priscilla Walmsley [mailto:priscilla@walmsley.com]
Sent: Friday, August 16, 2002 1:18 PM
To: 'Dave Yancey'
Cc: xml-dev@lists.xml.org
Subject: RE: [xml-dev] XML-Schema Help
Sorry David,
This is still non-deterministic because when the parser encounters a
description element, it does not know which branch of the content model
to take. I think what you want is:
> <xs:complexType name="timeframeType">
<xs:sequence>
<xs:element ref="description" minOccurs="0"/>
> <xs:choice>
> <xs:sequence>
> <xs:element ref="earliestdate"/>
> <xs:element ref="latestdate" minOccurs="0"/>
> </xs:sequence>
> <xs:element ref="latestdate"/>
> </xs:choice>
</xs:sequence>
> </xs:complexType>
Hope that helps,
Priscilla
-----------------------------------------------------
Priscilla Walmsley priscilla@walmsley.com
Author, Definitive XML Schema (Prentice Hall PTR)
-----------------------------------------------------
> -----Original Message-----
> From: Dave Yancey [mailto:dyancey1@hotmail.com]
> Sent: Friday, August 16, 2002 4:11 PM
> To: jeni@jenitennison.com; JCHIUSANO@lmi.org
> Cc: bryce@sysonyx.com; xml-dev@lists.xml.org
> Subject: Re: [xml-dev] XML-Schema Help
>
>
> Thanks to all who helped.
>
> I apologize for not being clear on what I was looking for. I
> wasn't positive
> it could be done for I am new to Schemas. But thanks to
> everyones help
> below is what I have and is doing exactly what I needed.
>
>
>
> <xs:complexType name="timeframeType">
> <xs:choice>
> <xs:sequence>
> <xs:element ref="description" minOccurs="0"/>
> <xs:element ref="earliestdate"/>
> <xs:element ref="latestdate" minOccurs="0"/>
> </xs:sequence>
> <xs:sequence>
> <xs:element ref="description" minOccurs="0"/>
> <xs:element ref="earliestdate" minOccurs="0"/>
> <xs:element ref="latestdate"/>
> </xs:sequence>
> </xs:choice>
> </xs:complexType>
>
>
> ----
> David Yancey
>
>
>
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