Annotation in ORegAnno can be associated to evidence as determined from the original publication. Evidence is essentially a controlled description of the assay which elucidated the functional regulatory nature of the sequence. It also describes such character as whether an experiment confirms a transcription factors presence, a binding site, or another intrinsic property of the regulatory sequence. Visit here for a description of Evidence Classes, Types, and Subtypes. New additions to the ORegAnno evidence classifications are welcomed through the ORegAnno mailing lists.