The Periodic Table of Elements
Elements is an open source collaborative project where we work on a collection of experiments to more rapidly bring technical innovation to Bitcoin. Elements are features that are proposed and developed in this technical community that in arbitrary combinations can be fashioned into sidechains.
These are the features under currently available in Elements Core, the open-source reference implementation for sidechains. For projects built with the latest version of Elements, such as Liquid, you can expect them to support each of these features.
For a list of proposed Elements, see the bottom of this document.
These are some of the features currently under development, but are not yet ready for deployment on a public sidechain.