The 3-day P5+1 (China, Britain, France, Russia, USplus Germany) and Iran talks in Vienna was aimed to clinch a deal on the framework document which would conduct the negotiation in the future to end the decade-long dispute Iranian nuclear issue.

No document was finalized in the Iranian nuclear talks as of Wednesday, but all sides has made their proposals clear and seek to continue the negotiation, diplomats involved in the talk told Xinhua on Wednesday night.

"The negotiation goes on well so far" said an anonymous official, adding that though there was no agreement on any document yet, the talk was positive, as all sides have the political will to resolve the issue by diplomatic channel.

Iran's ISNA news agency said on Wednesday afternoon a draft negotiation agenda had been agreed but not yet finalized.

It seems that all sides are cautious about the details in the document which could be very decisive in the future negotiations to make a comprehensive deal over the Iranian nuclear issue.

It's not surprising that the talk has not yield concrete progress until now, as the Iran nuclear issues are complicated and long-term unresolved.

The 3-day talk is based on the interim deal agreed in Geneva last November, which Iran agreed to suspend some controversial nuclear activities while western states relief relevant sanctions on Iran in return, according to media reports.