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This document summarizes the changes to the UCSC Genome Browser Hub TrackDb specification.
| Date | Track Types | Link to Doc | Change |
|---|---|---|---|
| 2023-11-08 | bigBed, bigGenePred, bigChain, bigPsl | decorator.* | Various statements to overlay annotations onto others, e.g. protein domains on gene models, mutations on exons, or summits on chip-seq peaks |
| 2023-10-16 | bigGenePred, bigChain, bigPsl | mouseOver, mouseOverField | mouseOver works for all bigBed-based file formats |
| 2023-06-27 | all | maxItems | Change: maxItems, increased default to 10,000, 10x more items can be shown. |
| 2023-04-04 | all | downloadUrl | New: downloadUrl <fileType> <URL> Shows a link where user can download a file. On the UCSC browser, the link is shown above the description page. Right now this is used for GFF files on gene tracks. |
| 2022-09-30 | bigBed, BAM | doWiggle | New: doWiggle on Instead of showing the features, show coverage of features, as a 'wiggle' (signal) style track. Can be switched off by the user on the track config page. |
| 2022-09-22 | bigGenePred | colorByStrand | Change: colorByStrand can now be used by bigGenePred-type tracks. |
| 2022-06-30 | bigPsl, bigChain | otherTwoBitUrl | New: otherTwoBitUrl <URL> This statement allows to store query sequences in a separate twoBit file rather than in the annotation file itself, which can reduce the size of the annotation file. |
| 2022-05-14 | bigWig | logo | New: logo on Motif logo of the genome sequence, as a "dynseq" display, see the example. |
| 2022-05-05 | bigMaf, maf | logoMaf | New: logoMaf on Motif logo on MAF/bigMaf alignment tracks. Zooming in on alignment shows nucleotides scaled by phyloP conservation. |
| 2019-05 | all | useOneFile | useOneFile on Adding the 'useOneFile on' line to the hub.txt section of a hub allows the contents of all three files to be referenced inside of one file. |