title: Validation and mismatch repair of workflows through typed data streams.
abstract: The type system of a language guarantees that all of the operations on a set of data comply with the rules and conditions set by the language. While language typing is a fundamental requirement for any programming language, the typing of data that flow between processing elements within a workflow is currently being treated as optional. In this paper, we introduce a three-level type system for typing workflow data streams. These types are parts of the Data Intensive System Process Engineering Language programming language, which empowers users with the ability to validate the connections inside a workflow composition, and apply appropriate data type conversions when necessary. Furthermore, this system enables the enactment engine in carrying out type-directed workflow optimizations.
authors.affiliation: School of Informatics, University of Edinburgh, 10 Crichton Street, Edinburgh EH8 9AB, UK. gyaikhom@gmail.com
authors.forename: Gagarine
authors.initials: G
authors.lastname: Yaikhom
authors.forename: Malcolm P
authors.initials: MP
authors.lastname: Atkinson
authors.forename: Jano I
authors.initials: JI
authors.lastname: van Hemert
authors.forename: Oscar
authors.initials: O
authors.lastname: Corcho
authors.forename: Amy
authors.initials: A
authors.lastname: Krause