releaseAction

                     The releaseAction attribute is used to control how a Web
                     Feature service releases locks on feature instances after
                     a Transaction request has been processed.

                     Valid values are ALL or SOME.

                     A value of ALL means that the Web Feature Service should
                     release the locks of all feature instances locked with the
                     specified lockId regardless or whether or not the features
                     were actually modified.

                     A value of SOME means that the Web Feature Service will 
                     only release the locks held on feature instances that 
                     were actually operated upon by the transaction.  The
                     lockId that the client application obtained shall remain
                     valid and the other, unmodified, feature instances shall
                     remain locked.
                    
                     If the expiry attribute was specified in the original
                     operation that locked the feature instances, then the
                     expiry counter will be reset to give the client
                     application that same amount of time to post subsequent
                     transactions against the locked features.