pipeline non traité(A pipeline that does not support COM+ transactions. MtsPipeline and PooledPipeline are the only objects that support non-transacted pipelines)
pipeline traité(A pipeline that supports COM+ transactions. MtsTxPipeline and PooledTxPipeline are the only objects that support transactions. If any component in a transacted pipeline fails, the work of the preceding components in the pipeline is undone and the object ends the transaction)