[
Lists Home |
Date Index |
Thread Index
]
> Kawaguchi-san wrote an
> interesting article about this a couple of months ago [1]
> where he gives
> another example of a derivation by restriction that look
> correct but isn't.
>
> Cheers,
> /Eddie
>
> [1] http://www.xml.com/pub/a/2001/06/06/schemasimple.html?page=1
I think intuition would expect (incorrectly) the following to be a valid
restriction:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
xmlns:qux="http://www.example.com/foobar";
targetNamespace="http://www.example.com/foobar";
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:simpleType name="name_t">
<xs:restriction base="xs:string">
<xs:pattern value="[A-Z][a-z]*"/>
</xs:restriction>
</xs:simpleType>
<xs:complexType name="foo">
<xs:sequence>
<xs:element name="firstName" type="qux:name_t"/>
<xs:element name="lastName" nillable="false">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:pattern
value="[A-Z][a-z]*"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:sequence>
</xs:complexType>
<xs:complexType name="bar">
<xs:complexContent>
<xs:restriction base="qux:foo">
<xs:sequence>
<xs:element name="firstName">
<xs:simpleType>
<xs:restriction
base="qux:name_t">
<xs:pattern
value="L[a-z]*"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="lastName"
nillable="false">
<xs:simpleType>
<xs:restriction
base="xs:string">
<xs:pattern
value="[A-Z][a-z]*"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:sequence>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
</xs:schema>
|
