Plex.content is incorrect in dr-flat.rnc

[greenTara]

Instead of

Plex.content =
meta-roles.content,
element slot { slot.type }*,
((arg | arg.content)+
| repo?
| element slot { slot.type }*
| resl?
| repo
| element slot { slot.type }*
| resl?
| resl

Should be

Plex.content =
  meta-roles.content,
  element slot { slot.type }*,
  (((arg | arg.content)+, 
    repo?,
   element slot { slot.type }*,
   resl?)?
   | (repo,
   element slot { slot.type }*,
   resl?)
   | resl)