1. A system for handling eCommerce requests, comprising: (a) at least one application configured to process a request in a transformed format, wherein the request is received from one of a plurality of requesting entities in an original format and mapped to the transformed format; (b) at least one specification document configured to produce metadata defining a relationship between data of the request in the original format and data of the request in the transformed format; and (c) a flow manager configured to utilize the metadata to map the request in the original format to the request in the transformed format and to call the at least one application.