Reminder: MathML Full meeting on Thursday

 Agenda
1. Announcements/Updates/Progress reports
2. Continue reviewing the MathML 4 doc <https://w3c.github.io/mathml/> and
issues
   a) Nailing down the intent grammar
<https://github.com/w3c/mathml/issues/252>
   b) Nailing down names for known/unknown intent value (previously level
1/3 and core/level 3).
       Deyan recent suggestions: core/open.
   c) Where are these two levels of lists maintained? Deyan's meta-proposal
<https://github.com/w3c/mathml/issues/252#issuecomment-1133044277>
   d) Common core attributes and what they do on non-core elements
<https://github.com/w3c/mathml/issues/361>