edmiStartModelsWriteTransaction

Reserves exclusive write privileges to an arbitrary number of models. Any number of clients may open a model for write access at the same time. This is possible because all persistent changes within models must be done within a model write transactions. Conflicts are avoided by only allowing one open model write transaction within each model at any point of time. If a client attempts to start a model write transaction on a selected group of models while an other client has already reserved exclusive write privileges for him self by starting a model write transaction within one or more of these models, the first client will have to wait until the ongoing transaction is either committed or aborted. In order to start a model write transaction on a selected group of models, all the models 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