Frontend/Backend protocol question.

Hey all,

According to
http://www.postgresql.org/docs/9.1/static/protocol-flow.html#AEN91458
"is not actually necessary for the frontend to wait for
ReadyForQuery before issuing another command".

But is it necessary for frontend to wait for ReadyForQuery
before sending Describe message? Or is it necessary to
wait for RowDescription/NoData after sending Describe
before sending Query or, say, Prepare?

In short, is it necessary for frontend to wait for responses
on sent messages before sending a new ones?

Thanks!

--
// Dmitriy.