For clarification: Each field found should be included once in the list.
author
core version
created
creator
dependents
description
list
modified
title
type
...
In the TiddlyWiki's HTML file, these fields can be found in the <div> tags.
Now I'm surprised that the field "text" is not explicitly present. The field "text" is implicitly equal to the <pre> tag.
In packed plugin tiddlers, there is an explicit field "text" in the <pre> tag.
These fields should also be listed.
text
module-type
library
...
An additional counter, in how many tiddlers the respective field is used, would be desirable.
Also, a classification, if this field is only used by standard, system, shadow tiddlers and/or combinations of these tiddler types.
Regard
Cd.K