The World Trade Organization (WTO) has given its long-awaited ruling on the biggest trade dispute in its history.

世界贸易组织给出了期待已久的关于历史上最大的贸易纠纷的裁决。

The decision, which is officially confidential¹（机密的）, is over whether the European Union gave illegal subsidies²（补助金，津贴） to planemaker Airbus as the US argues.

The Wall Street Journal and others reported that the WTO had found in favour of the US position.

But a UK government source told the BBC that the WTO verdict was much more of a "mixed outcome".

"The decision really questions the wisdom of taking this to the WTO in the first place," the UK source said.

"Boeing will be far from jubilant（欢呼喝彩的，喜洋洋的） tonight."

Both US and European diplomats⁴ have declined to officially release the ruling, which is more than 1,000 pages long.

The decision is not expected to be officially made public for at least several months.

Partially⁵ upheld?

The EU has also made a counter claim against the US for its support of Boeing. A ruling on the EU's claim against the US is due in the next six to eight months.

The ruling on Airbus comes after five years of deliberations（考虑，细想）.

Other US news reports had suggested that subsidies from Brussels were illegal under world trade rules.

US Representative Norm Dicks, who was briefed by US trade officials, told the Associated Press that the WTO ruling confirms the original complaint by the U.S. from 2004.

"For many years we have contended that direct financial assistance from the European governmental partners of Airbus has represented an unfair launch subsidy⁶ that has allowed Airbus to increase its market share in the large civil aircraft market and to steal US aircraft manufacturing jobs," he said.

"Today's interim⁷ ruling from the WTO panel definitively⁸ confirms that contention⁹."

Mr Dicks represents the US state of Washington, where Boeing is based.

But the UK government source told the BBC said the verdict did not suggest that the EU had engaged in systematic¹⁰ aid to Airbus.

Aid given by the EU to the European aircraft maker³ for its A350 aircraft was not cited, for example, the source said.

'Good case'

Experts say the WTO's decision will set the boundaries for acceptable government funding in civil aviation（民用航空）.

But Howard Wheeldon, senior strategist at BGC Partners, said there was still a long way to go in the saga（传说，英雄事迹）.

"This whole WTO process is going to last four to five years. It's going to be 2013 at least before we get a final settlement on this," he said.

He added that Boeing and Airbus have to find terms so that they can work together based on what the WTO actually rules.

Louis Gallois, the chief executive of Airbus's parent company EADS, said before the decision that he believes the company has a "very good case".