Policy construct for string "concatenation"

Good afternoon: I was hoping to see if anyone could provide the best syntax to concatenate two strings being used in a comparison (policy.conf). Synopsis: We intend to compare an LDAP group name to a Freeradius shortname, but we want the shortname to be "shortname" ++ "otp". The existing syntax (which we believe will work) is : if ( clients_ldap-Ldap-Group == FreeRadius-Client-Shortname) New syntax : if ( clients_ldap-Ldap-Group == ) The Manpage for unlang references double quotes around variable, but one is a constant. Should I declare a variable and then quote them - "FreeRadius-Client-Shortname vOTP" Thanks in advance, Ray