Hi..
There is a bit of customisation done .. ( from your company standards ), BIM Manager ..etc
Checkout these addition, probably " Text" might be the parameter which is associated which you are looking for.." z"
( no one can say for sure here till we have hands on actual revit family / file )
Custom Parameters ( These can be Project parameters or Shared depending one the setup )
Secondly if you want to see the actual family used for that " Section " Head and Section tail then follow this...
Section - Section Tag - Section Head / tail...

and if you are curious to find where those section tail are then you can check in the families..
just right click on the main type ( not sub type ) and Edit...
it should open the Section head family to edit..

Hope that helps..
If you will have further questions..
someone will help you out for sure..
Cheers.
Corsten
Building Designer