why the default value of autocommit is false

[univerz]

I get a connection from the DataSource
by the java.sql.Connection specification the default value of autocommit is true,but in jboss is not,
and in weblogic it is true,why jboss didn't follow the specification?

[mccaffc]

I'm curious... Is it up to the driver implementation to set the property, or the container?