A block of documentation, introducing either a complete document, or one of the codegroup or codereference blocks.
codegroup, codereference, programcode
(title ,
description ?
,
authorlist ?
,
userkeywords ?
,
softwarekeywords ?
,
copyright ?
,
history ?
,
mdefs ?
)
docblock |_(title, |__description?, |__authorlist?, |__userkeywords?, |__softwarekeywords?, |__copyright?, |__history?, |__mdefs?)