OpenOffice Writer Index builder is very useful, but has some problems. For example even if terms are removed from the concordance file and a document is re-indexed the removed terms remain indexed. A macro can be written for Microsoft Word to remove all index marks, for example [https://forum.openoffice.org/en/forum/viewtopic.php?t=106555]
Unfortunately going back and forth between Writer and Word creates problems with complex documents. How can a similar macro be written for OpenOffice Writer? Word displays indexed terms if CTRL - SHIFT - 8 is pressed and then the indexing can be manually removed. How can indexed terms by displayed and edited in Writer?
Open Office and Libre Office .odt files are .zip files.
If renamed with .zip suffix the actual content fie is obtained as content.xml.
A script can be written to remove xml statements setting index marks.
Found the LibreOffice generated xml file simpler to process and once the .odt is re-zipped with the processed content.xml file the index marks disappear and there are less problems than with the OpenOffice version.file.