REDCap users at any institution could download and use REDCap-reviewed versions of validated data collection instruments [51]. We built features to support localization for those in non-U.S. environments (e.g., local data validation types and language abstraction to allow partners to translate REDCap into non-English languages). Data collection and software configuration resources were maintained by two new consortium-driven workgroups, the REDCap Library Oversight Committee and the Field Validation Group. We also built a “plug-in” development framework that allowed local developers to add custom REDCap functionality for individual projects. An initial set of restful API methods were developed and disseminated to enable back-end, record level data transactions for local teams desiring to build interoperability between REDCap and other systems. Initial API functionality included basic data import and export features, but later evolved to include more sophisticated methods (e.g., project creation, project metadata editing, project users and user rights management).
