針對xml模式的XML驗證在php中失敗，但在.NET（VS2010）中有效

Question

我有幾個xml文件，但是我只給出一個文件和用於驗證它的xsd文件。 首先讓我描述一下問題。 我在VS2010中編輯文件，而VS運行時解析器在編輯xml文件時未顯示任何錯誤。 然后，當我運行一個php命令行腳本，該腳本加載xml文件並針對xml架構對其進行驗證時，它的結尾是一個例外，說

警告：DOMDocument :: schemaValidate（）：元素'element'：未找到keyref'elementRef'的鍵序列['answers']匹配項。

但是，我真的看不到xsd文件中的錯誤。

xml文件：

<domain xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="Answer" namespace="Custom\Surveys" xsi:noNamespaceSchemaLocation="../../xsd/domain.xsd">
    <entities>
        <entity name="Answer" main="true" schema="answers"/>
    </entities>
    <bindings>      
    </bindings>
    <key>
        <element entity="answers" property="question_option_id"/>
        <element entity="answers" property="survey_voter_id"/>
    </key>
</domain>

xsd文件中的XML模式：

<?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">   
    <xs:element name="domain">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="entities">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="entity" minOccurs="1" maxOccurs="unbounded">
                                <xs:complexType>
                                    <xs:attribute name="name" type="xs:string" use="required" id="entityName" />
                                    <xs:attribute name="main" type="xs:boolean" use="optional" default="false" />
                                    <xs:attribute name="schema" type="xs:string" use="required" id="schemaName" />                                  
                                </xs:complexType>                               
                            </xs:element>
                            <xs:element name="multientity" minOccurs="0" maxOccurs="1">
                                <xs:complexType>
                                    <xs:attribute name="name" type="xs:string" use="required" />
                                    <xs:attribute name="schema" type="xs:string" use="required" />
                                </xs:complexType>
                            </xs:element>
                        </xs:sequence>
                    </xs:complexType>                   
                </xs:element>
                <xs:element name="bindings" minOccurs="0" maxOccurs="1">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="bind" minOccurs="0" maxOccurs="unbounded">
                                <xs:complexType>
                                    <xs:sequence>
                                        <xs:element name="referenced">
                                            <xs:complexType>
                                                <xs:attribute name="entity" type="xs:string" use="required" />
                                                <xs:attribute name="property" type="xs:string" use="required" />
                                            </xs:complexType>
                                            <xs:keyref name="referencedRef" refer="entityId">
                                                <xs:selector xpath="." />
                                                <xs:field xpath="@entity" />
                                            </xs:keyref>
                                        </xs:element>
                                    </xs:sequence>
                                    <xs:attribute name="entity" type="xs:string" use="required" />
                                    <xs:attribute name="property" type="xs:string" use="required" />
                                </xs:complexType>
                                <xs:keyref name="bindRef" refer="entityId">
                                    <xs:selector xpath="." />
                                    <xs:field xpath="@entity" />
                                </xs:keyref>
                            </xs:element>
                        </xs:sequence>
                    </xs:complexType>
                </xs:element>
                <xs:element name="key">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="element" minOccurs="1" maxOccurs="unbounded">
                                <xs:complexType>
                                    <xs:attribute name="entity" type="xs:string" use="required" />
                                    <xs:attribute name="property" type="xs:string" use="required" />
                                </xs:complexType>
                                <xs:keyref name="elementRef" refer="entityId">
                                    <xs:selector xpath="." />
                                    <xs:field xpath="@entity" />
                                </xs:keyref>
                            </xs:element>
                        </xs:sequence>
                    </xs:complexType>                   
                </xs:element>
            </xs:sequence>
            <xs:attribute name="name" type="xs:string" use="required" />            
            <xs:attribute name="namespace" type="xs:string" use="required" />
        </xs:complexType>
        <xs:key name="entityId">
            <xs:selector xpath="./entities/entity|./entities/multientity" />
            <xs:field xpath="@schema" />
        </xs:key>
    </xs:element>
</xs:schema>

Answer 1

我找到了一個解決方案，我必須在根元素的最后定義所有鍵和keyref。

這是新的xsd文件：

<?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">   
    <xs:element name="domain">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="entities">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="entity" minOccurs="1" maxOccurs="unbounded">
                                <xs:complexType>
                                    <xs:attribute name="name" type="xs:string" use="required" id="entityName" />
                                    <xs:attribute name="main" type="xs:boolean" use="optional" default="false" />
                                    <xs:attribute name="schema" type="xs:string" use="required" id="schemaName" />                                  
                                </xs:complexType>                               
                            </xs:element>
                            <xs:element name="multientity" minOccurs="0" maxOccurs="1">
                                <xs:complexType>
                                    <xs:attribute name="name" type="xs:string" use="required" />
                                    <xs:attribute name="schema" type="xs:string" use="required" />
                                </xs:complexType>
                            </xs:element>
                        </xs:sequence>
                    </xs:complexType>                   
                </xs:element>
                <xs:element name="bindings" minOccurs="0" maxOccurs="1">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="bind" minOccurs="0" maxOccurs="unbounded">
                                <xs:complexType>
                                    <xs:sequence>
                                        <xs:element name="referenced">
                                            <xs:complexType>
                                                <xs:attribute name="entity" type="xs:string" use="required" />
                                                <xs:attribute name="property" type="xs:string" use="required" />
                                            </xs:complexType>                                           
                                        </xs:element>
                                    </xs:sequence>
                                    <xs:attribute name="entity" type="xs:string" use="required" />
                                    <xs:attribute name="property" type="xs:string" use="required" />
                                </xs:complexType>                               
                            </xs:element>
                        </xs:sequence>
                    </xs:complexType>
                </xs:element>
                <xs:element name="key">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="element" minOccurs="1" maxOccurs="unbounded">
                                <xs:complexType>
                                    <xs:attribute name="entity" type="xs:string" use="required" />
                                    <xs:attribute name="property" type="xs:string" use="required" />
                                </xs:complexType>
                            </xs:element>
                        </xs:sequence>
                    </xs:complexType>                   
                </xs:element>
            </xs:sequence>
            <xs:attribute name="name" type="xs:string" use="required" />            
            <xs:attribute name="namespace" type="xs:string" use="required" />
        </xs:complexType>
        <xs:key name="entityId">
            <xs:selector xpath="./entities/entity|./entities/multientity" />
            <xs:field xpath="@schema" />
        </xs:key>
        <xs:keyref name="elementRef" refer="entityId">
            <xs:selector xpath="./key/element" />
            <xs:field xpath="@entity" />
        </xs:keyref>
        <xs:keyref name="bindRef" refer="entityId">
            <xs:selector xpath="./bindings/bind" />
            <xs:field xpath="@entity" />
        </xs:keyref>
        <xs:keyref name="referencedRef" refer="entityId">
            <xs:selector xpath="./bindings/bind/referenced" />
            <xs:field xpath="@entity" />
        </xs:keyref>
    </xs:element>
</xs:schema>

Answer 2

如果可能的話，我建議始終將keyref及其對應的密鑰放在同一級別（在同一元素聲明中）。 從理論上講，它不是必需的，但是當您不做這些規則時，它們會變得異常復雜，有時甚至違反直覺。 （我之所以不告訴您規則是什么，是因為我知道閱讀該領域的規范會傷害我的大腦，如果不閱讀該規范，我將無法記住規則。）