BMT-Bean Managed Transaction
BMTD-Bean Managed Transaction Demarcation
CMT-Container Managed Transaction
CMTD-Container Managed Transaction demarcation.
Are these what you had implied
?
If yes,
A BMT bean uses BMTD using something like
while transaction mgmt is taken care for CMT bean by the container. Bean provider can control the transaction mgmt by setting the transaction attributes.