Since there is no forum specific to the XHTML export add-on project I’ll post this here.
The table that specifies transitions on XHTML export has a typo for “Trigger” field. It is missing an ‘r’ so the label “Tigger” appears on the export.
It seems the “issues” tracker on XHTML github page has never been used so… if any maintainer of the add-on is reading this, can you fix this? It seems to be in the files below: