PReF: describing key Preprint Review Features

Preprints catalyze rapid and open communication of research. A frequent criticism of preprints, however, is their lack of peer review. In recent years, myriad new initiatives have enabled review of preprinted research to be coordinated, collected, and displayed alongside preprints. This provides evaluation and context for readers, as well as feedback for the authors. The processes behind preprint review are diverse and may differ from journal peer review, which can be a challenge for readers seeking to compare and interpret the reviews. To address this, the ASAPbio organized a working group that set out to define key features of preprint review processes. Here, we describe Preprint Review Features (PReF) as descriptors and provide an implementation guide. PReF captures the key elements of preprint review processes using 8 standard key-value pairs. PReF can serve within the descriptions of individual preprint review processes, and act as search filters on indexing services. Widespread adoption of PReF will promote understanding and categorization of preprint review and improve its discoverability.