To the Logical Domains Manager, constraints are one or more resources you want to have assigned to a particular domain. You either receive all the resources you ask to be added to a domain or you get none of them, depending upon the available resources. The list-constraints subcommand lists those resources you requested assigned to the domain.
To list constraints for one domain:
# ldm list-constraints ldom
To list constraints in XML format for a particular domain:
# ldm list-constraints -x ldom
To list constraints for all domains in a parseable format:
# ldm list-constraints -p