Method and apparatus for workflow validation and execution

Abstract

A computer program product comprising: a non-transitory computer readable medium; and a description of a first block comprising: a definition of one or more output port groups each comprising one or more output ports; a definition of two or more input ports, the input ports receive object streams of identical length; one or more instructions for processing input data received in the input ports and for outputting processed data in the output port groups, wherein the instructions are operative to output a same number of output objects to each output port in a same output port group, whereby the output ports of the output port group are operative to output objects stream of identical length, and wherein the instructions are operative to receive a same number of input objects from each input port, whereby the input ports are operative to receive object streams of identical length; and an indication of whether there is a constant ratio between a number of items in input streams received by the first block and a number of items in output streams outputted by the first block; and wherein said description of a first block is stored on said non-transitory computer readable medium.