XML 데이터 유효성 검사를 위해 정규식을 사용한 코드 예제에 대한 자세한 설명

/*** examples.xml ***/
<?xml version="1.0" encoding="gb2312"?>
<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="examples.xsd">
    <user>
  <name>test</name>
  <email>moonpiazza@hotmail.com</email>
  <ip>127.0.0.1</ip>
  <color>#000000</color>
    </user>
    <user>
  <name>guest</name>
  <email>guest@371.net</email>
  <ip>202.102.224.25</ip>
  <color>#FFFFFF</color>
    </user>    
</root>


/*** examples.xsd ***/
<?xml version="1.0" encoding="gb2312"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

<xsd:element name="root" type="Root"/>

<xsd:complexType name="Root">
 <xsd:sequence>
  <xsd:element name="user"  type="User" minOccurs="0" maxOccurs="unbounded" />
 </xsd:sequence>
</xsd:complexType>

<xsd:complexType name="User">
 <xsd:sequence>
  <xsd:element name="name" type="xsd:string"/>
  <xsd:element name="email" type="Email" />
  <xsd:element name="ip" type="IP" />
  <xsd:element name="color" type="Color" />
 </xsd:sequence>
</xsd:complexType>

<xsd:simpleType name="Email">
 <xsd:restriction base="xsd:string">
  <xsd:pattern value="([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)"/>
 </xsd:restriction>
</xsd:simpleType>

<xsd:simpleType name="IP">
 <xsd:restriction base="xsd:string">
  <xsd:pattern value="(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.
  (25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.
  (25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])"/>
 </xsd:restriction>
</xsd:simpleType>

<xsd:simpleType name="Color">
 <xsd:restriction base="xsd:string">
  <xsd:pattern value="#?([a-f]|[A-F]|[0-9]){3}(([a-f]|[A-F]|[0-9]){3})?"/>
 </xsd:restriction>
</xsd:simpleType>

</xsd:schema>


/*** examples.htm ***/
<SCRIPT LANGUAGE="javaScript">
function validate()
{
 var oXML ;
 var nParseError;
 var sReturnVal;

 oXML = new ActiveXObject("MSXML2.DOMDocument.4.0") ;
 oXML.async = false ;
 oXML.validateOnParse = true;

 oXML.load("examples.xml") ;

 nParseError = oXML.parseError.errorCode ;
 sReturnVal = "" ;

 if (0 != nParseError)
 {
  //参看书籍教程中parseError对象属性
  sReturnVal = sReturnVal + "代码：" + oXML.parseError.errorCode + "\n" ;
  sReturnVal = sReturnVal + "错误原因：" + oXML.parseError.Reason + "\n" ;
  sReturnVal = sReturnVal + "错误字符串：" + oXML.parseError.srcText + "\n" ;
  sReturnVal = sReturnVal + "错误行号" + oXML.parseError.line + "\n" ;
  sReturnVal = sReturnVal + "错误列数：" + oXML.parseError.linepos + "\n" ;
 }
 else
 {
  sReturnVal = sReturnVal + "验证通过！"
 }

  alert(sReturnVal);
}

function window.onload()
{
 validate();
}
</SCRIPT>