<resolver:AttributeDefinition id="norEduPersonNIN" xsi:type="Script" xmlns="urn:mace:shibboleth:2.0:resolver:ad">![CDATA[
        // Script to handle 10 position wide national identity numbers
        // Create 12 position wide norEduPersonNIN from the attribute employeeNumber
        // Change employeeNumber to your NIN attribute name
        <resolver:Dependency ref="myLDAP" />
        try {  <resolver:AttributeEncoder xsi:type="enc:SAML1String"

                  name="urn:mace:dir:attribute-def:norEduPersonNIN" />
        <resolver:AttributeEncoder xsi:type="enc:SAML2String"      // Get a ref to the NIN received from ldap
                name="urn:oid:1.3.6.1.4.1.2428.90.1.5" friendlyName="norEduPersonNIN" />        // Change employeeNumber to your NIN attribute name
        <Script>
                <![CDATA[nin=employeeNumber.getValues().get(0);
               // Script to handle 10 position wide national identity numbers
// Only do decoration of NINs which are on the format YYMMDDxxxx
    // Create 12 position wide norEduPersonNIN from the attribute mittPersonnummer
           if(nin.length() == 10) {
 // Change employeeNumber to your NIN attribute name
                        try// {
Create the two alternative return strings we have to choose between 
                     // Get a ref to the NIN received from ldap
  pnr19 = "19" + nin;
                          // Change mittPersonnummer to your NIN attributepnr20 name
= "20" + nin;
                             nin=employeeNumber.getValues().get(0);
   // Extract year/month/day from the NIN string
                       // Only do decoration of NINs which are on them_y format YYMMDDxxxx= nin.substring(0,2);
                                if(m_m = nin.lengthsubstring(2,4);
 == 10) {
                             m_d = nin.substring(4,6);
         // Create the two alternative return strings we have to choose between
            // Create a Date object for the 20xx case
                    pnr19 = "19" + nin;
        datePnr = new Date("20" + m_y, m_m-1, m_d);
                          pnr20 = "20" + nin;
  // Create a Date object for the current date
                              // Extract year/month/day from the NIN stringdateCur = new Date(); 
                                // Verify the value of datePnr before proceeding
  m_y = nin.substring(0,2);
                            if(isNaN(datePnr.valueOf())) {
           m_m = nin.substring(2,4);
                           throw("Failed to parse the NIN into a       m_d = nin.substring(4,6Date object");
                                }       
 // Create a Date object for the 20xx case
                       // If the 20xx case is in the future we assume 19xx for the NIN attribute
  datePnr = new Date("20" + m_y, m_m-1, m_d);
                        if(datePnr>dateCur) {
               // Create a Date object for the current date
                 norEduPersonNIN.getValues().add(pnr19);
                        dateCur = new Date();
     } else {
                                 // Verify the value of datePnr before proceeding norEduPersonNIN.getValues().add(pnr20);
                                }        if(isNaN(datePnr.valueOf())) {
                        } else if(nin.length() == 12) {
                   throw("Failed to parse the NIN into a Date object");
     norEduPersonNIN.getValues().add(nin);
                        } else {
         }
                       throw("Not setting any norEduPersonNIN since it is bogus (length=" + nin.length() + "): " +   // If the 20xx case is in the future we assume 19xx for the NIN attribute
nin); 
                        }       
                }      if(datePnr>dateCur) {
                catch(err) {
                        throw("Not setting   any   norEduPersonNIN.getValues().add(pnr19);
        due to exception: " + err); 
                     }            } else {
        ]]>     
            </Script>
</AttributeDefinition>

work in progress...