A representation of the XML X509Data element as defined in the W3C Recommendation for XML-Signature Syntax and Processing. An X509Data object contains one or more identifiers of keys or X.509 certificates (or certificates' identifiers or a revocation list). The XML Schema Definition is defined as:

   <element name="X509Data" type="ds:X509DataType"/>
   <complexType name="X509DataType">
       <sequence maxOccurs="unbounded">
         <choice>
           <element name="X509IssuerSerial" type="ds:X509IssuerSerialType"/>
           <element name="X509SKI" type="base64Binary"/>
           <element name="X509SubjectName" type="string"/>
           <element name="X509Certificate" type="base64Binary"/>
           <element name="X509CRL" type="base64Binary"/>
           <any namespace="##other" processContents="lax"/>
         </choice>
       </sequence>
   </complexType>

   <complexType name="X509IssuerSerialType">
     <sequence>
       <element name="X509IssuerName" type="string"/>
       <element name="X509SerialNumber" type="integer"/>
     </sequence>
   </complexType>

An X509Data instance may be created by invoking the newX509Data methods of the KeyInfoFactory class and passing it a list of one or more XMLStructures representing X.509 content; for example:

  KeyInfoFactory factory = KeyInfoFactory.getInstance("DOM");
  X509Data x509Data = factory.newX509Data
      (Collections.singletonList("cn=Alice"));