SBOL version 2.1

Version 2.1 of the Synthetic Biology Open Language (SBOL version 2.1) has now been officially released, improving our means of representing biological designs. In addition to a bunch of little technical changes useful for implementation, the key changes with this release are:

• You can describe how the nature of a biological component changes when it's used as part of a larger design.
• It's simpler to mark up features of a design.
• We filled in a bunch of missing terms for describing interactions between components.
• You can describe the topology of components (e.g., circular vs. linear DNA)

I have some musings on the standards release process that I'd like to share later, but for now I just want to cheer and encourage people to update if they're using SBOL and consider adopting if they aren't yet.