19. A computer program product for cross domain security information conversion, the computer program product embodied on a recordable computer-readable medium, the computer program product comprising computer program instructions which when installed and executed on a data processing system, are capable causing the data processing system to carry out the steps of: receiving from system entity, in a security service, security information in a native format of a first security domain regarding a system entity having an identity in at least one security domain, wherein the system entity comprises automated computing machinery translating the security information to a canonical format for security information; transforming the security information in the canonical format using a predefined mapping from the first security domain to a second security domain; translating the transformed security information in the canonical format to a native format of the second security domain; and returning to the system entity the security information in the native format of the second security domain.
19. A computer program product for cross domain security information conversion, the computer program product embodied on a recordable computer-readable medium, the computer program product comprising computer program instructions which when installed and executed on a data processing system, are capable causing the data processing system to carry out the steps of: receiving from system entity, in a security service, security information in a native format of a first security domain regarding a system entity having an identity in at least one security domain, wherein the system entity comprises automated computing machinery translating the security information to a canonical format for security information; transforming the security information in the canonical format using a predefined mapping from the first security domain to a second security domain; translating the transformed security information in the canonical format to a native format of the second security domain; and returning to the system entity the security information in the native format of the second security domain. 28. The computer program product of claim 19 wherein the second native format is expressed in XML, the canonical format is expressed in XML, and computer program instructions for translating the transformed security information in the canonical format to a native format of the second security domain comprises a predefined mapping, expressed in XSL, from the canonical format to the native format of the second security domain.