我有这个现有的 XSD,它试图将一个值限制为一个 URL,但它不起作用。id 为空白,文档仍然有效。当我输入任何文本时,它也会验证。
<xsd:schema xmlns:atom="http://www.w3.org/2005/Atom" xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.w3.org/2005/Atom" elementFormDefault="qualified" attributeFormDefault="unqualified">
...
<xsd:complexType name="feedType">
<xsd:choice minOccurs="3" maxOccurs="unbounded">
<xsd:element name="id" type="atom:idType" minOccurs="1" maxOccurs="1"/>
...
<xsd:complexType name="idType">
<xsd:annotation>
<xsd:documentation>
The Atom id construct is defined in section 4.2.6 of the format spec.
</xsd:documentation>
</xsd:annotation>
<xsd:simpleContent>
<xsd:extension base="xsd:anyURI">
<xsd:attributeGroup ref="atom:commonAttributes"/>
</xsd:extension>
</xsd:simpleContent>
</xsd:complexType>
…………
<feed xmlns="http://www.w3.org/2005/Atom" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.w3.org/2005/Atom ../XMLschemas/atom/2005/v/0.2/atom.xsd">
<id>https://mydomain.com</id>