Manuscript Exchange Common Approach

To Do

• strip out elements from Reviews DTD that aren't needed

Reivews DTD questions resolved 2017-09-26

• Should the non-Reviews DTDs be included in this repository? yes
• MathML 2 or 3? 3
• tex-math? include
• xi:includes? omit
• OASIS tables? omit
• ISO entities? omit