Alrighty then. After a bit of trial and error and realizing that there were
other considerations when a tiddler has a succession of two tags, but then
those two tags have a common single tag and also having to make sure that I
didn't break the normal case where only one tag was involved (whew!), I
came up with the code below. It does work for all cases that I've come
across so far in my TW. I know that it only handles the case when there is
a single tag or two tags, but not more than two. It was definitely a
learning experience. Now the trick will be to remember those lessons
learned.
I would appreciate any feedback if anyone sees a simpler or more generic
way of doing it or there is something fundamentally wrong with the way I
did it.
<!-- use kin filter to find succession of tags -->
<$list filter="[title<currentTiddler>
tags[]tag[Railroads]count[]compare:number:eq[1]then<currentTiddler>]">
Successors to ''<<currentTiddler>>'':
<ul>
<$list filter="[title<currentTiddler>
kin:tags:from[]!is[system]!title[Railroads]!title<currentTiddler>]"> ->
<$link><$view field="title"/>
</$link>
</$list>
</ul>
</$list>
<$list filter="[title<currentTiddler>
tags[]tag[Railroads]count[]compare:number:gt[1]then<currentTiddler>]">
Successors to ''<<currentTiddler>>'':
<$list filter="[title<currentTiddler>tags[]tag[Railroads]first[]]"
variable=firsttag>
<$list filter="[title<currentTiddler>tags[]tag[Railroads]last[]]"
variable=secondtag>
<ul>
<$list filter="[title<firsttag>
kin:tags:from[]!is[system]!title[Railroads]!title<currentTiddler>]"> ->
<$link><$view field="title"/>
</$link>
</$list>
</ul>
<ul>
<$list filter="[title<secondtag>
kin:tags:from[]!is[system]!title[Railroads]!title<currentTiddler>]"> ->
<$link><$view field="title"/>
</$link>
</$list>
</ul>
</$list>
</$list>
</$list>
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