The following sidebar tabs give examples of grouped lists created by nesting.
For the Types tab, the outer list filter as shown below selects each discrete value found in the type field. The inner list filter selects all the (non-system) tiddlers with that type.
<$list filter={{$:/core/Filters/TypedTiddlers!!filter}}>
<div class="tc-menu-list-item">
<$view field="type"/>
<$list filter="[type{!!type}!is[system]sort[title]]">
<div class="tc-menu-list-subitem">
<$link to={{!!title}}><$view field="title"/></$link>
</div>
</$list>
</div>
</$list>
The list in the Recent tab is generated using the timeline macro. Here, the outer list filter selects each discrete day found in the modified field, while the inner list filter selects all the tiddlers dated the same day in the modified field.
\define timeline-title()
\whitespace trim
<!-- Override this macro with a global macro
of the same name if you need to change
how titles are displayed on the timeline
-->
<$view field="title"/>
\end
\define timeline(limit:"100",format:"DDth MMM YYYY",subfilter:"",dateField:"modified")
<div class="tc-timeline">
<$list filter="[!is[system]$subfilter$has[$dateField$]!sort[$dateField$]limit[$limit$]eachday[$dateField$]]">
<div class="tc-menu-list-item">
<$view field="$dateField$" format="date" template="$format$"/>
<$list filter="[sameday:$dateField${!!$dateField$}!is[system]$subfilter$!sort[$dateField$]]">
<div class="tc-menu-list-subitem">
<$link to={{!!title}}><<timeline-title>></$link>
</div>
</$list>
</div>
</$list>
</div>
\end