I am not sure if it means the same...
"unspecified tran context" from the spec
� The Container may execute the method and access the underlying resource managers without a transaction context.
� The Container may treat each call of an instance to a resource manager as a single transaction (e.g. the Container may set the auto-commit option on a JDBC
� The Container may merge multiple calls of an instance to a resource manager into a single transaction.
� The Container may merge multiple calls of an instance to multiple resource managers into a single transaction.
� If an instance invokes methods on other enterprise beans, and the invoked methods are also designated to run with an unspecified transaction context, the Container may merge the resource manager calls from the multiple instances into a single transaction.
� Any combination of the above.
"Without a transaction" is only a case in unspecified transaction context