We are proposing, and presenting a first version of, a new standard for reaction and reaction-related data description based on the Health Level Seven Structured Product Labeling data exchange standard. We have shown that R-SPL can seamlessly combine robust and reliable description of structural data and physical quantities in a machine-readable and fully semantic format using strict coded terminologies and quantitative parameters, with inclusion of not (yet) semantically resolved textual data in free-text paragraphs. Data schemas or models and databases are important for automated analysis, querying, and gathering inferences, but human language has infinite expressiveness. Humans like documents with their freedom of unconstrained expression. Data are best carried in the documents where they originate because information extraction and data mining are hard and error prone. It is a chore for people to have to enter data into computer systems; and data entry to computer systems divorces data from the original source. Databases with "comment" fields are not as useful because the original train of thought is butchered. Rich text document support is important for expressivity. Data should not be divorced from text. If you have a downstream system that requires data alone to be shared, and cannot handle the document text, then that text can simply be excluded for that system, but the users should not be deprived of a place to express themselves completely. Reaction SPL therefore allows the user to combine the best of both worlds.