Addition of Metadata through Barcode File. A. Format of barcode file. Column headings act as keys for values in column cells. Strings specifying keys and values must consist of ASCII characters without whitespace. Values in a row are separated by tabs. B. Output of sequences annotated through metadata associated with barcodes. C. Output following sequence renaming and dereplication on the basis of metadata (in this case, by sample name). The "xsrep_count" metadata indicates the number of identical sequences recovered from a sample.