> is it OK to rewrite it in another language (using original code as blueprint)
No. However if you just take a specification of the code’s expected behavior (in this case a description of the markup language), and do a “clean-room” reimplementation where you never look at the original code, you should be in the clear from what I understand.
No. However if you just take a specification of the code’s expected behavior (in this case a description of the markup language), and do a “clean-room” reimplementation where you never look at the original code, you should be in the clear from what I understand.