A prominent type of document in chemistry is reaction patents for which file reaction-patent.xml (in the supplementary material ZIP file) is an example. This R-SPL file describes the patent WO 2010/027150 A2, claiming a new preparation of hydroxychloroquine . All the parts of the patent (Abstract, Background Art, Claims etc.) are included as structured document text, with section and paragraph and table and figure entries, showing how R-SPL is indeed a document format which can be used to produce human readable documents. Reactions are presented using the same principle <processStep> and <interactor> elements already shown above. Firstly we introduced ad-hoc codes such as "stir" and "temperature" where we use a meaningful word itself as the code. These codes could of course be sourced from an appropriate terminology or ontology once they are well defined there. But until such a terminology of chemical processes exists, we can simply make up codes and gather lists of codes somewhere.