One entry, with all its subdivisions, see and see also terms, and navigational pointers (if any) presented in a structural index.
The following, in order:
<term> Term
Any combination of:
<index-entry> Index Entry
<ext-link> External Link
<nav-pointer> Navigation Pointer
<nav-pointer-group> Navigation Pointer Group
<see-entry> See Structural Index Entry
<see-also-entry> See-Also Structural Index Entry