Parsing RealLegal's .PTX file format

Anyone have experience parsing the RealLegal PTX file format? I'm interested in creating a Mac reader client for this proprietary format.

开发者_运维知识库The PTX file format is in wide use for storing court and deposition transcripts.

Given that it's proprietary you're probably unlikely to find any public specification of it. However, given also that they don't appear to have a Mac presence, perhaps it might be worth it to enter into a business relationship with RealLegal? Sounds like a great proposal to help them expand the *.ptx market share (good for them) and for you to build a software product that presumably has some demand (good for you).