689349fca5a4865a1891db8cd39d392657b2b09b
jcasper
  Wed Apr 22 02:54:09 2026 -0700
Replacing the subtrackUrl setting for faceted composites with subtrackUrls,
which supports outlinks in multiple fields.  refs #36320

diff --git src/hg/htdocs/goldenPath/help/trackDb/changes.html src/hg/htdocs/goldenPath/help/trackDb/changes.html
index ae2b62f1993..a616d45e259 100755
--- src/hg/htdocs/goldenPath/help/trackDb/changes.html
+++ src/hg/htdocs/goldenPath/help/trackDb/changes.html
@@ -33,30 +33,37 @@
 
 <DIV class="trackDbDoc_intro">
 <H1>Track Database Definition</H1>
 
 <p>This document summarizes the changes to the <a href="trackDbHub.html">UCSC Genome Browser Hub TrackDb specification</a>.<p>
 
 <TABLE class="settingsTable" id="Common_Settings">
 <tbody>
 <tr valign="TOP">
 <th width="100">Date</th>
 <th width="15%">Track Types</th>
 <th width="15%">Link to Doc</th>
 <th>Change</th>
 </tr>
 
+<tr>
+    <td>2026-04-22</td>
+    <td>faceted composite tracks</td>
+    <td><a href="trackDbHub.html#subtrackUrls">subtrackUrls</a></td>
+    <td>An update for the subtrackUrls option for faceted composites, which
+    enables links out to other resources in the faceted table.</td>
+</tr>
 <tr>
     <td>2026-04-10</td>
     <td>vcf, vcfTabix, vcfPhasedTrio</td>
     <td><a href="trackDbHub.html#sampleMetadataFile">sampleMetadataFile</a></td>
     <td>Add per-sample metadata columns to the VCF genotype details table.
     Points to a tab-separated file with a <code>#sample</code> header line;
     columns are appended to the genotype table on the item details page.</td>
 </tr>
 <tr>
     <td>2026-04-08</td>
     <td>bigBed</td>
     <td><a href="trackDbHub.html#detailsScript">detailsScript</a></td>
     <td>Add custom JavaScript visualizations (e.g. histograms) to the item details page.
     An ES6 module is loaded on demand and renders into the extra fields table.
     First plot type: histogram, for logfmt-encoded allele frequency data.</td>