5709a7858d5c197721be66d5218a79124abadb70
lrnassar
  Tue Mar 17 08:46:31 2026 -0700
Adding alt text to images across static documentation pages, CGI headers, markdown docs, and Pandoc templates. Content images receive AI-generated descriptive alt text; decorative images (icons, spacers, toggles) receive alt="" per WCAG best practice. Also adds Image Descriptions section to the accessibility page, and fixes Pandoc Lua writers to output alt attributes. 67 files, covering help docs, news archive, ENCODE pages, portal pages, and session examples. refs #37254

diff --git src/hg/htdocs/goldenPath/help/trackSearch.html src/hg/htdocs/goldenPath/help/trackSearch.html
index 7be7eda6a3b..65377de9436 100755
--- src/hg/htdocs/goldenPath/help/trackSearch.html
+++ src/hg/htdocs/goldenPath/help/trackSearch.html
@@ -1,92 +1,92 @@
 <!DOCTYPE html>
 <!--#set var="TITLE" value="Genome Browser Track Search" -->
 <!--#set var="ROOT" value="../.." -->
 
 <!-- Relative paths to support mirror sites with non-standard GB docs install -->
 <!--#include virtual="$ROOT/inc/gbPageStart.html" -->
 
 <!-- Track Search Help Page -->
 <h1>Track Search</h1> 
 <p> 
 The Genome Browser's Track Search feature allows users to find and display tracks of interest 
 quickly and easily.</p> 
 
 <h2>Searching</h2>
 <p>
 The track search feature provides users with two search options, &quot;Search&quot; and 
 &quot;Advanced.&quot; If multiple terms are entered, only tracks with all terms will be part of the 
 results. We do not currently support either/or searching (e.g. a OR b).</p> 
 <p>
 <strong>Search tab: </strong> &quot;Search&quot; is the default tab of the track search feature. To 
 search for a track, enter search terms into the box and click search. This search looks for the 
 user's terms in the track names, descriptions, groups, and metadata. Metadata is information, such 
 as cell line, experiment type, and treatment, about ENCODE data.</p> 
 <p>
 <strong>Advanced tab: </strong> The &quot;Advanced&quot; tab allows users to search for terms in a 
 specific aspect of the track (e.g., the track name, the description, and the track group) and can 
 be especially helpful for finding ENCODE tracks by setting specific criteria in the &quot;ENCODE 
 terms&quot; section of this tab.</p> 
 <p>
 The <em>ENCODE terms</em> section of the Advanced tab (which is not available in all assemblies)
 allows users to further refine their search for ENCODE tracks using ENCODE metadata. By default, 
 there are two rows of ENCODE metadata search criteria, but more can be added by clicking the 
 &quot;+&quot; button. To remove an added metadata search row, click the &quot;-&quot; button. Each
 row is comprised of a drop-down menu followed by either a second drop-down menu or a text field. 
 The first drop-down menu contains the searchable metadata categories available. The type of 
 metadata term selected in the first drop-down determines the type of search available. Some 
 metadata will have a second drop-down containing the possible metadata terms in that category 
 available to search on. Most of these drop downs are multi-select lists, so users can select one 
 or multiple terms. Other metadata types will have a text field for users to enter specific search 
 terms. There are two types of text fields. If the phrase preceding the text field is 
 &quot;contains,&quot; then the field is a free text field, with the option of using the percent 
 sign (%) as a wildcard. If the phrase "is among" precedes the text field, then it is possible to 
 enter a comma-separated list to find all tracks with any of the values in the list in that 
 metadata category. This comma-separated list also accepts the percent sign (%) as a wildcard. 
 Because these metadata drop-downs are assembly dependent, the options available may vary from 
 assembly to assembly. Some categories have a link to the far right of the row if there is more 
 information available about the terms.</p> 
 
 <h2>Results</h2> 
 <p> 
 After clicking the &quot;Search&quot; button, the first 100 tracks that meet the search criteria are
 displayed.</p> 
 <p> 
 <strong>Check-box/Visibility: </strong> Tracks that are currently being displayed in the browser 
 will have their check-box selected. To turn tracks on or off, select or deselect the associated 
 check-box. To turn all tracks listed on the current results page on or off, click the &quot;+&quot; 
 or &quot;-&quot; button at the top of the column. By default, selecting the check-box of a track 
 turns the track to pack as long as pack is a valid view mode of the track. If it isn't, the track 
 is set to full or show. Once the check-box of a track is selected, the visibility can be changed 
 using the drop-down menu in the visibility column.</p> 
 <p> 
-The <img class="gbsInlineImg" src="../../images/folderWrench.png" width="15" height="15"> icon 
+The <img alt="" class="gbsInlineImg" src="../../images/folderWrench.png" width="15" height="15"> icon 
 designates &quot;container tracks&quot; that can be configured by clicking the icon. Container 
 tracks don't have data themselves; instead, they contain other tracks that do have data. Examples of
 container tracks are composite tracks, which have a light orange background in the search results, 
 and super-tracks, which have a tan background; tracks that contain data have a yellow background. 
 While tracks within a container track may show up in the search results and can be configured from 
-the search results page, this isn't always the case. Clicking <img class="gbsInlineImg" 
+the search results page, this isn't always the case. Clicking <img alt="" class="gbsInlineImg" 
 src="../../images/folderWrench.png" width="15" height="15"> opens the 
 container track configuration page, allowing the all the tracks within the container track to be 
 viewed and configured. Please note, since container tracks don't have data of their own, turning one
 on via track search may result in no additional tracks in the browser. If this occurs, it is because
 none of the tracks within the container were turned on.</p> 
 <p> 
 <strong>Track information: </strong> To find out more information about a track, click on the Track 
 Name. The description of the track or the container track will pop-up. Click &quot;x&quot; at the 
 top of the pop-up or the &quot;OK&quot; at the bottom to close it. For tracks that have metadata, 
 mainly ENCODE tracks at this time, there is a &quot;...&quot; link on the right-hand side of the 
 track result row. Clicking this link expands the row to show the track's metadata.</p> 
 <p>
 <strong>Sorting:</strong> By default, resulting tracks are listed in order of relevance. However,
 in the blue header of the results list, the sort order can be changed by selecting one of the other 
 radio buttons, &quot;Alphabetically&quot; or &quot;by Hierarchy&quot; (super-tracks listed first, 
 then composite tracks, and then data tracks).</p> 
 <p> 
 <strong>Return to Browser/View in Browser: </strong> The &quot;Return to Browser&quot; button 
 indicates that no tracks have been turned on or off. Clicking on the button returns the user to the 
 browser. Once any track is turned on or off using the check-boxes, the button label changes to 
 &quot;View in Browser&quot; (indicating changes have been made), and clicking on the button takes 
 the user to the browser with the new track selections displayed.</p>
 
 <!--#include virtual="$ROOT/inc/gbPageEnd.html" -->