Create a <tt>.ctags</tt> file in your home directory, then copy and paste the following:
<nowiki> --langdef=context --regex-context=/^[[:space:]]*\\startsection[[:space:]]*\[[^]]*title[[:space:]]*=[[:space:]]*\{[[:space:]]*(.+)\}/\. \1/s,section/
--regex-context=/^[[:space:]]*\\startsubsection[[:space:]]*\[[^]]*title[[:space:]]*=[[:space:]]*\{[[:space:]]*(.+)\}/\.\. \1/s,subsection/
--regex-context=/^[[:space:]]*\\startsubsubsection[[:space:]]*\[[^]]*title[[:space:]]*=[[:space:]]*\{[[:space:]]*(.+)\}/\.\.\. \1/s,subsubsection/
--regex-context=/^[[:space:]]*\\startsubject[[:space:]]*\[[^]]*title[[:space:]]*=[[:space:]]*\{[[:space:]]*(.+)\}/SUBJ \1/c,subject/
--regex-context=/^[[:space:]]*\\startpart[[:space:]]*\[[^]]*title[[:space:]]*=[[:space:]]*\{[[:space:]]*(.+)\}/\1/p,part/
</nowiki>
Put this in your <tt>vimrc</tt>: