Meandre: Semantic-Driven Data-Intensive Flows in the Clouds

- Meandre is a semantic-driven data-intensive workflow infrastructure for distributed computing. It allows users to assemble modular components into complex workflows (flows) in a visual programming tool or using a scripting language called ZigZag. - Workflows are composed of components, which can be executable or control components. Executable components perform computational tasks when data is available, while control components pause workflows for user interactions. Components are described semantically using ontologies to separate functionality from implementation. - Data availability drives workflow execution in Meandre. When required inputs are available, components will fire and produce outputs to make data available for downstream components. This dataflow approach aims to make workflows transparent, intuitive, and reusable across