Open source solutions offer great reuse opportunities. However , the difficulty lies on the appropriation of these solutions to meet specific business requirements. We aim in this work to decompose an open source application in specific functionalities as a conceptual view for service orchestration. We provide a solution to characterize a func-tionality of an open source application in a readable and standardized way. Then we provide an automated solution for the externalization of these characterized functionalities as an Application Programing Interface. Our approach uses capability profile provided by ISO 16100 series which is a standardized methodology for interoperability of manufacturing software. As a result, we generate reusable components for service orchestration needs.