• There are in eXtensible Markup Language (XML) that use:
  • Conceptual relationships
  • topology (internal or external link specification to the document)
  • anchor localization language
  • presentation formatting
  • behavior

• XML link characteristics are exclusive when belonging to the same axis, but they are complementary otherwise.

• While XML conceptual-relationships are similar to those of RMM, XML topology link-axis actually is a form to allow n-ary link specification, not possible in HTML