The three-day talks between Iran and six major world powers in Vienna are aiming to clinch a deal on a framework document which would be the basis for negotiations to end the Iranian nuclear issue.
No document was finalised in the Iranian nuclear talks by Wednesday, but all sides have made their proposals clear and seek to continue the negotiation, diplomats involved in the talks told Xinhua.
"The negotiation has gone well so far," said an official, adding that though there was no agreement on any document yet, the talk was positive, as all sides had the political will to resolve the issue by diplomatic channel.
Iran's ISNA news agency said Wednesday afternoon a draft negotiation agenda had been agreed but not yet finalised.
The three-day talks are based on the interim deal agreed in Geneva last November, in which Iran agreed to suspend some controversial nuclear activities while Western states relief relevant sanctions on Iran in return, according to media reports.
The six major world powers include Britain, China, France, Russia, the US and Germany.