edmiStartModelWriteTransaction

Reserves exclusive write privileges to a model. Any number of clients may open a model for write access at the same time. This is possible because all persistent changes within model must be done within a model write transaction. Conflicts are avoided by only allowing one open model write transaction within a model at any point of time. If a client attempts to start a model write transaction while an other client has already reserved exclusive write privileges for him self by starting a model write transaction, the first client will have to wait until the ongoing transaction is either committed or aborted. In order to start a model write transaction, the model must be opened for write. Ordinary transactions may be nested within a model write transaction with edmiStartTransaction. However, model write transactions may not be nested within ordinary transactions. Closing a model write transaction is done by one of the following EDMInterface operations; edmiCommitTransaction, edmiAbortTransaction, edmiCommitAllTransactions, edmiAbortAllTransactions