Suppose you have a book with the following structure:
and that you need partial TOCs on each chapter.
When you create a TOC it is possible to build it "for the chapter", but Writer considers as "chapter" only level 1 headings. That means you cannot set "Part" as level 1 and "Chapter" as level 2 because partial TOCs will not work as intended.
There are several workarounds for the limitation, but none of them are optimal because they imply more manual work on building the TOCs. Hence the proposal: make it possible to choose which outline level is considered as "chapter" for the TOC.
Related enhancement request:
Bug 94218 - footnote numbering per chapter: define outline level that resets numbering
Regina: is this possible with the current ODF?
No. The attribute is text:index-scope and it has the literal values "document" and "chapter". For chapter the description is: "A chapter consists of all those paragraphs and headings which have the same immediately preceding heading with outline level 1." So the level is explicitly named as "1".
Ok, so it is not possible to implement this enhancement request in LibreOffice today.
Nonetheless I'll change the status to NEW with metabug "ODF-spec". Maybe sometime in the future ODF will allow such feature, then it's ready to implement. Other users can find this bug request easier with no resolution which will prevent duplicates.
From my point of view I would appreciate such feature.