The workflow and metadata are retrievable by their identifier using a standardised communication protocol (A1) A1 has two essential measures. The first measure is to use a standardised protocol for retrieval of workflow and its metadata which means that the user should be able to access at least the metadata by using the internet and a web browser. The second measure is to provide the terms and conditions under which the workflow is accessible. This does not necessarily mean that the workflow is openly available but that the terms and conditions can be accessed for free. For MAW, the workflow metadata is accessible via WorkflowHub, which uses a standard protocol such as HTTPS (for web access) and an API (for programmatic access) to retrieve the workflow metadata. Lastly, the licence used for MAW is MIT, which allows permissive free software usage .