Mapping DSL?

Mapping a ContractCreated message

map type "ContractCreated" 
  of security "InterestRateSwap"
  for client "ABC" (
    header.conversationId to header.conversationId
    header.messageId to header.messageId
    header.sentBy to header.sentBy
    ...
    contract.header.identifier.partyReference[href] to contract.header.identifier.partyReference[href]