2 MAY 2011 to 3 MAY 2012 Ranking period which determines Olympic qualification
There will be 172 badminton players at the London Games - 86 from each gender - playing in five events, namely the men's and women's singles and doubles plus the mixed doubles.
Nations can enter a maximum of three players into each singles event, and at most two pairs into each doubles event.
Qualification rests on where players stand in the Badminton World Federation (BWF) rankings list when it is published on 3 May 2012. The rankings take into account all performances between 2 May 2011 and 29 April 2012.
Put simply, the governing body will go down that list allocating places (respecting the rules on maximum entrants per country, as above) until the Olympic competition is full.
There are some caveats - for example, there must be at least one competitor from each of badminton's five continental federations in every singles and doubles event. Finally, there are two invitational places on offer in both the men's and women's singles.
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