Question

我有以下架构可以正常工作：

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="bindings">
        <xs:complexType>
            <xs:sequence maxOccurs="unbounded">
                <xs:element name="bind">
                    <xs:complexType>

                        <xs:attribute name="trigger" use="required">
                            <xs:simpleType>
                                <xs:restriction base="xs:string">
                                    <xs:minLength value="1"/>
                                </xs:restriction>
                            </xs:simpleType>
                        </xs:attribute> <!-- trigger -->

                        <xs:attribute name="command" use="required">
                            <xs:simpleType>
                                <xs:restriction base="xs:string">
                                    <xs:minLength value="1"/>
                                </xs:restriction>
                            </xs:simpleType>
                        </xs:attribute> <!-- command -->

                    </xs:complexType>
                </xs:element> <!-- bind -->
            </xs:sequence>
        </xs:complexType>
    </xs:element> <!-- bindings -->
 </xs:schema>

但是，当我尝试为顶级bindings元素定义属性时，无论我在何处放置属性代码，都会收到错误。我错过了什么或做错了什么？

编辑：看起来我的Java XML代码或Xerces存在一些问题。如果我更改XSD以为顶级元素提供可选的“父”属性，则Xerves会向我提供错误"Problem: schema_reference.4: Failed to read schema document 'null', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>."但是，如果我为该属性提供任何名称//其他//而不是“父”，它会报告Attribute 'parent' is not allowed to appear in element 'bindings'.，正如您所期望的那样。

关于XSD和Xerces的我的Java代码是：

    bindingsDocumentBuilderFactory =
        DocumentBuilderFactory.newInstance();
    DocumentBuilderFactory bdbf = bindingsDocumentBuilderFactory;

    bdbf.setValidating(true);

    // I get the input stream here as "is"

    bdbf.setAttribute("http://java.sun.com/xml/jaxp/properties/schemaLanguage",
                      "http://www.w3.org/2001/XMLSchema");
    bdbf.setAttribute("http://java.sun.com/xml/jaxp/properties/schemaSource", is);

编辑2 ：

正在验证的XML文件：

<bindings parent="game/movement">
    <bind trigger="i" command="INVENTORY"/>
</bindings>

Answer 1

这有效（参见名为code的属性）：

<?xml version="1.0"?> 
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> 
    <xs:element name="bindings"> 
        <xs:complexType> 
            <xs:sequence maxOccurs="unbounded"> 
                <xs:element name="bind"> 
                    <xs:complexType> 
                        <xs:attribute name="trigger" use="required"> 
                            <xs:simpleType> 
                                <xs:restriction base="xs:string"> 
                                        <xs:minLength value="1"/> 
                                </xs:restriction> 
                            </xs:simpleType> 
                        </xs:attribute> 
                        <!-- trigger --> 
                        <xs:attribute name="command" use="required"> 
                            <xs:simpleType> 
                                <xs:restriction base="xs:string"> 
                                        <xs:minLength value="1"/> 
                                </xs:restriction> 
                            </xs:simpleType> 
                        </xs:attribute> 
                        <!-- command --> 
                    </xs:complexType> 
                </xs:element> 
                <!-- bind --> 
            </xs:sequence> 
            <xs:attribute name="code"/>
        </xs:complexType> 
    </xs:element> 
    <!-- bindings --> 
</xs:schema>

Attribute

将属性赋予顶级元素时，Xerces报告错误

1 个答案: