In the context of rapid growth of institutional repositories, the PEER project (www.peerproject.eu) has been set up to monitor the effects of systematic archiving of author's final peer-reviewed manuscript over time. This document describes the output interchange that was tuned for the PEER Depot for the integration and distribution of the metadata information provided by publishers within the PEER project. It is based on the TEI's Guidelines for Text Encoding and Interchange (P5), with some additional constraints intended to make the corresponding information structures univocally interpretable.