FLOW STEPS IN WEBMETHODS:


1)  INVOKE :-  Invokes a service such as flow service, java service, C service (or) webservice.
2) BRANCH :-   Conditionally execute one step from a set of specified alternatives.
                       Two types of Branches: 1) Branch on Switch value : Use a variable  to determine which child step executes.
                                                             2) Branch on escpression : Use an escpression which child step executes. use evaluate labels to true.
3) REPEAT :-  Repeat a set of flow steps upto a specified number of times  or until a step in the set fails or succeeds as specified.
4) SSEQUENCE :- Group a set of flow steps and control the way in which failure of member of the set is processed.
5) LOOP :- Repeat a set of flow steps over the elements of a specified array.
6) EXIT :- Exit the entire flow (or) exit a single flow step.
7) MAP :-  Link, add, edit and delete pipe line variables or invoke several services that operate on the same set of pipe line variables.
8) PIPELINE :- Is a general term used to refer data structure in which input and output values are maintained for a flow service. It allows services in flow to share data.