Headings are often used as targets in wiki links.
However, the heading text can change and so templates often exist to add an ID to use as a link fragment.
The template is often added:

• below the heading — This may leave the heading out of sight above the display after following the link
• above the heading — This is "more correct" for displaying the heading, but the template is not included within a section edit
• inside the heading — This is simpler for editing, but pollutes an edit summary following a section edit

The "correct" solution to all this is to define a wiki syntax for headings that will add the fragment ID to the H* tag itself.

Possible choices might be:

• ===The heading#fragmentID=== — unsafe as the hash character could possibly be an intended part of the heading text
• ===The heading|fragmentID=== — ditto with the pipe character
• ===The heading===fragmentID — Probably safe, as headings currently should not have any following text
• ===The heading===fragmentID=== — Probably more safe, as existing headings cannot already contain ===