Picard MarkDuplicates with UMI
In MarkDuplicates, how is the newly added UMI option specified? The documentation (https://broadinstitute.github.io/picard/command-line-overview.html ) refers to a BARCODE_TAG string option; should this value be the name of the bam tag used for storing the umi (e.g., if the umi tag is of the form bc:Z:ACTG, then this option should be set to "bc")?
Is there a standard bam tag name for the UMI barcode (BX?). It is my understanding "BC" (and the corresponding "QT" tag) refers to the sample barcode, is this correct