Helmut Ortman published an Open Source ReqIF importer for Sparxsystems Enterprise Archtiect on GitHub.

The open source tool hoReverse now supports import of ReqIF requirements.
The main features are:
– ReqIF Version 1.0, 1.1, 1.2
– Import the requirements according to an Import Specification
— Nested requirements
— Graphics, text and attributes
— A requirement module is stored in a package
— Linked Document for formatted text
— Tagged values for attributes
— Tested for DOORS
For more see: