A representation of the XML 
X509IssuerSerial element as
 defined in the 
 W3C Recommendation for XML-Signature Syntax and Processing.
 An 
X509IssuerSerial object contains an X.509 issuer
 distinguished name (DN) and serial number pair. The XML schema definition is
 defined as:
 
   <element name="X509IssuerSerial" type="ds:X509IssuerSerialType"/>
   <complexType name="X509IssuerSerialType">
     <sequence>
       <element name="X509IssuerName" type="string"/>
       <element name="X509SerialNumber" type="integer"/>
     </sequence>
   </complexType>
 
 An 
X509IssuerSerial instance may be created by invoking the
 
newX509IssuerSerial method
 of the 
KeyInfoFactory class, and passing it a
 
String and 
BigInteger representing the X.500
 DN and serial number. Here is an example of creating an
 
X509IssuerSerial from the issuer DN and serial number of an
 existing 
X509Certificate:
 
 KeyInfoFactory factory = KeyInfoFactory.getInstance("DOM");
 X509IssuerSerial issuer = factory.newX509IssuerSerial
     (cert.getIssuerX500Principal().getName(), cert.getSerialNumber());