The block below shows the Chemical JSON \cite{openchemistrychemicaljson} representation of a water molecule. It contains a unique key of "chemicalJson" that can be used to identify the convention being used, along with a numeric version identifier of '1'. The first iteration used "chemical json" with a version of "0" before the decision was taken to switch to camelCase to simplify client code. The "atoms" object contains "elements" identifying the atoms by their atomic number. The "coords" object contains a "3d" array that has 3N numbers representing the Cartesian coordinates in Angstroms. There is also a "bonds" object containing connectivity of atoms (using a zero-based index), and the bond orders.