At those sessions, he said, the two sides exchanged "proposals and thoughts" on how their differences could be resolved.
Parties may continue to exchange visible proposals or contribute their own suggestions to the mix.
The two sides exchanged proposals at a Friday evening meeting, and agreed not to discuss their contents with the press.
The two sides had not talked since Friday night, when they exchanged proposals that a mediator called "substantially apart."
Instead, they exchanged proposals by fax and talked on the phone.
United, for its part, is far from exchanging specific proposals with its labor groups.
As part of his research he exchanged ideas and proposals with other hackers and scientists.
The two sides say they will exchange opening proposals, neither of which is expected to resemble the other.
We exchanged proposals, and we're waiting for them to get back to us after their partnership meetings.
With that touch of reality in mind, the two sides exchanged proposals, or at least ideas, on the tax.