How about a union of "positiveInteger" and a "string" with "length=0"?
Sandy Gao
Software Developer, IBM Canada
(1-905) 413-3255
[EMAIL PROTECTED]
"Benson Cheng"
<[EMAIL PROTECTED] To: <[EMAIL PROTECTED]>
acore.net> cc:
Subject: RE: Allow emptyTag for
optional fields
06/20/2002 01:58
PM
Please respond
to xerces-j-user
I thought about the nillable attributes, but I don't have any control of
the incoming XML instance.
Benson.
-----Original Message-----
From: Beyer,Nathan [mailto:[EMAIL PROTECTED]
Sent: Thursday, June 20, 2002 10:46 AM
To: '[EMAIL PROTECTED]'
Subject: RE: Allow emptyTag for optional fields
This question would probably be better asked on the W3C's xmlschema-dev
list.
Using a minOccurs restricts an elements cardinality, not it's content. An
empty element is an element making an occurrence. The type declares the
content's limitations, so when you using anything besides a basic string,
an
empty element is usually invalid.
What you may want to try is using the nillable attribute, like this:
<xsd:element name="Age" type"xsd:positiveInteger" nillable="true"/>
And then send the XML as this:
<Age xsd:nil="true"/>
You'll have to check on the nillable syntax to see exactly how it's done.
-----Original Message-----
From: Benson Cheng [mailto:[EMAIL PROTECTED]
Sent: Thursday, June 20, 2002 12:37 PM
To: [EMAIL PROTECTED]
Subject: Allow emptyTag for optional fields
I have a schema question, how can I write the schema that allows emptyTag
for optional fields, for example:
Schema:
<xsd:element name="Partner">
<xsd:sequence>
<xsd:element name="Name" type
="xsd:string"/>
<xsd:element name="Age" type
="xsd:positiveInteger"
minOccurs="0"/>
</xsd:sequence>
</xsd:element>
XML-1:
<Partner>
<Name>MyName</Name>
</Partner>
XML-2:
<Partner>
<Name>MyName2</Name>
<Age/>
</Partner>
For the second XML, the Xerces throws a error like "Value '' is not a
integer", my question is how can I change the schema so it can allow both
XML, I know I can change the type of "Age" to xsd:string and use the
regular
expression "[0-9]{1,}", but I am wonder is there way to keep the
xsd:positiveInteger type and also allow the empty tag the same time?
Thanks
Benson.
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