FIX: The Validation of Keys Does Not Work If You Define More Than One Key (316797)

MORE INFORMATION

Steps to Reproduce the Problem

1. Create a new XML file named Test.xml, and then add the following code:

   <jsml xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="test.xsd">
   	
   	<class name="Singleton">
   		<events>
   			<event name="InstanceCreated" scope="class">
   				<desc>
   					Fired when the singleton instance is created.
   				</desc>
   			</event>
   		</events>
   		<property name="instance" scope="class" type="Singleton">
   			<desc>
   				Singleton instance, initialized on first access.
   			</desc>
   		</property>
   	</class>
   </jsml>
   					

2. Save Test.xml to your computer's hard disk.
3. Create a new .xsd file named Test.xsd, and then add the following code:

   <?xml version="1.0" encoding="utf-8" ?>
   <xsd:schema elementFormDefault="qualified" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   	
   	<xsd:element name="jsml" type="JsmlDocumentType">
   		
   	</xsd:element>
   	
   	<xsd:complexType name="JsmlDocumentType">
   		<xsd:sequence>
   			<xsd:element name="class" type="ClassType" minOccurs="1" maxOccurs="unbounded">
   				<xsd:key name="class-name-is-unique">
   					<xsd:selector xpath="class" />
   					<xsd:field xpath="@name" />
   				</xsd:key>
   			</xsd:element>
   		</xsd:sequence>
   	</xsd:complexType>
   		
   	<xsd:complexType name="ClassType" mixed="false">
   		<xsd:sequence>
   			<xsd:element name="events" type="EventsType" minOccurs="0" maxOccurs="1">
   				<xsd:key name="event-name-is-unique">
   					<xsd:selector xpath="event" />
   					<xsd:field xpath="@name" />
   				</xsd:key>
   			</xsd:element>
   			<xsd:element name="property" type="PropertyType" minOccurs="0" maxOccurs="unbounded" />
   		</xsd:sequence>
   		<xsd:attribute name="name" type="xsd:string" use="required" />
   		<xsd:attribute name="inherits" type="xsd:string" use="optional" />
   	</xsd:complexType>
   	
   	
   	<xsd:complexType name="EventsType" mixed="false">
   		<xsd:sequence>
   			<xsd:element name="event" type="EventType" minOccurs="1" maxOccurs="unbounded" />
   		</xsd:sequence>
   	</xsd:complexType>
   	
   	<xsd:complexType name="EventType" mixed="false">
   		<xsd:sequence>
   			<xsd:element name="desc" type="DescriptionType" minOccurs="0" maxOccurs="1" />
   		</xsd:sequence>
   		<xsd:attribute name="name" type="xsd:string" use="required" />
   		<xsd:attribute name="scope" type="ScopeType" use="required" />
   	</xsd:complexType>
   	
   	<xsd:complexType name="PropertyType" mixed="false">
   		<xsd:sequence>
   			<xsd:element name="desc" type="xsd:string" minOccurs="0" maxOccurs="1" />
   		</xsd:sequence>
   		<xsd:attributeGroup ref="IdentifierAttributeGroup" />
   	</xsd:complexType>
   
   		
   	<xsd:attributeGroup name="IdentifierAttributeGroup">
   		<xsd:attribute name="name" type="xsd:string" use="required" />
   		<xsd:attribute name="scope" type="ScopeType" use="required" />
   		<xsd:attribute name="type" type="xsd:string" use="required" />
   	</xsd:attributeGroup>
   	
   	<xsd:simpleType name="DescriptionType">
   		<xsd:restriction base="xsd:string" />
   	</xsd:simpleType>
   	
   	<xsd:simpleType name="ScopeType">
   		<xsd:restriction base="xsd:string">
   			<xsd:enumeration value="class" />
   			<xsd:enumeration value="instance" />
   		</xsd:restriction>
   	</xsd:simpleType>
   	
   	<xsd:simpleType name="YesNoType">
   		<xsd:restriction base="xsd:string">
   			<xsd:enumeration value="yes" />
   			<xsd:enumeration value="no" />
   		</xsd:restriction>
   	</xsd:simpleType>
   </xsd:schema>
   
   					

4. Save Test.xsd on drive C.
5. Create a Microsoft Visual C# .NET console project, and then replace the code in Class1.cs with the following code:

   using System;
   using System.IO;
   using System.Xml;
   using System.Xml.Schema;
   
   namespace ConsoleApplication1
   {
   	/// <summary>
   	/// Summary description for Class1.
   	/// </summary>
   	class Class1
   	{
   		/// <summary>
   		/// The main entry point for the application.
   		/// </summary>
   		[STAThread]
   		static void Main(string[] args)
   		{
   			try
   			{
   				XmlTextReader tr = new XmlTextReader("c:\\test.xml");
   				XmlValidatingReader vr = new XmlValidatingReader(tr);
   				
   				vr.ValidationType = ValidationType.Schema;
   				vr.ValidationEventHandler += new ValidationEventHandler (ValidationHandler);
   
   				while(vr.Read());
   				
   				Console.Read();
   			}
   			catch(XmlException xmlEx)
   			{
   				Console.WriteLine(xmlEx.Message);
   				Console.WriteLine("line: " + xmlEx.LineNumber +"\n"+ "src: " + xmlEx.Source);
   				Console.WriteLine(xmlEx.ToString());
   			}
   			catch(Exception ex)
   			{
   				Console.WriteLine(ex.Message+ "\n" + ex.ToString());
   			}			
   		}
   		public static void ValidationHandler(object sender, ValidationEventArgs args)
   		{
   			Console.WriteLine("***Validation error");
   			Console.WriteLine("\tSeverity:{0}", args.Severity);
   			Console.WriteLine("\tMessage  :{0}", args.Message);
   			
   		}
   	}
   }
   
   					

6. Compile the code, and then run it in debug mode:
   
   You receive the following error message:
   ***Validation error Severity:Error Message :There is a duplicate key sequence 'InstanceCreated' for 'event-name-is-unique' key or unique identity constraint. An error occurred at file:/ //c:/test.xml(5, 5).