Arvados

Situation: A user has samples in Arvados that they want to analyze, and they want to run a standard workflow on it. There are many versions of this workflow in the cluster (to keep track of history/provenance) but all new samples should just be run through the latest version. How do they find this workflow?

• They can traverse the project tree, but that requires them to already know how the projects are structured, and it's just old-fashioned.
• They can search, but then that returns all the versions in a flat list, and it's hard to feel confident about which one is latest.

In general, there should be an easy, streamlined way for users to run "the latest workflow" on a sample. There are lots of ways this could go so this needs design work. One possibility is that workflows have a concept of versions similar to collections.