MathML 2 or 3
- JATS users must choose MathML 2 or MathML 3
- Path from MathML 2 to MathML 3 not easy
- Some structures deprecated in MathML2 not available in MathML 3
- Some users say conversion would require 100% re-proofreading
- Use MathML 3 if possible
- Use MathML 2 only if large investment in MathML 2 documents and/or tools