Execution and data flow in a node. The standardized execution and data flow within a separate node in the Cyrille2 system. Execution starts with sending the object identifiers describing which objects serve as input for this specific node (A). The database-get script retrieves this data from the biological database (B), converts it to BioMOBY format (C) and sends it to the tool wrapper. The tool wrapper prepares the data for the tool (D), executes the tool, interprets its output (E) and converts it to BioMOBY (F). The database-store script stores the data in the biological database (G) and returns the newly created object identifiers (H) back to the system.