Yes NITRC XCEDE Schema Yes David Keator The XML-Based Clinical Experiment Data Exchange Schema provides an extensive metadata hierarchy for describing and documenting research and clinical studies. XCEDE was originally designed in the context of neuroimaging studies and complements the BIRN-HID XCEDE Schema Child Development Disorders, Pervasive, Domain Independent, CT, EEG/MEG, MR, PET/SPECT http://www.nitrc.org/projects/qa_procedure/, http://https://github.com/incf-nidash/XCEDE dbkeator@uci.edu