A format.wwfmt file is stored in each of the specific format folders. The format.wwfmt file defines all the stages required to create output, and the relationships between each of these stages. These stages are grouped in pipelines of related stages. When every stage of every pipeline has finished, ePublisher is done generating the output. There is no preconceived order in which pipelines run. ePublisher calculates at run time the order in which each pipeline runs. You can create or delete pipelines, add or delete stages, or insert a <Depends /> element that dictates when a stage or pipeline runs.