I have several xml files, but I will present only one and the xsd against which I validate it. Let me describe the problem at first. I edit the files in VS2010 and the VS run time parser shows no errors while editting the xml file. Then when I run a php command line script which loads the xml file and validates it against the xml schema, it ends with an excption saying
Warning: DOMDocument::schemaValidate(): Element ‘element’: No match found for key-sequence [‘answers’] of keyref ‘elementRef’.
However, I really cannot see a mistake in the xsd file.
Xml file:
<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>
Xml schema in an xsd file:
<?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>
I have found a solution, I had to define all the keys and keyrefs in the root element at the end.
Here goes the new xsd file: