The rules of Badminton can be found here: http://bwfbadminton.org/page.aspx?id=14915
This document describes the V1 Badminton match state contract.

Match Summary Message

The Summary message summarises the major match events into a single, easily digested message.
{
"FixtureId":"3421547",
"CustomerId":6444,
"CompetitorOne":{},
"CompetitorTwo":{},
"IsDoublesMatch":false,
"CurrentServer":"CompetitorOnePlayerOne",
"CurrentScore":{},
"MatchStatus":"BetweenPoints",
"IsReliable":true,
"MessageTimestampUtc":"2015-10-01T15:15:44.9551641Z"
"IsCoverageCancelled":false
}

Element	Type	Description
FixtureId	Integer	An immutable identifier for the event
CustomerId	Integer	An immutable identifier for the customer
CompetitorOne	Competitor	An object describing competitor one
CompetitorTwo	Competitor	An object describing competitor two
IsDoublesMatch	Boolean	True if this is a doubles match, false otherwise
CurrentServer	PlayerIdentifier, optional	An enum describing the current server. Values CompetitorOnePlayerOne CompetitorOnePlayerTwo CompetitorTwoPlayerOne CompetitorTwoPlayerTwo
CurrentScore	MatchScore	An object that describes the current match score
MatchStatus	MatchStatus	An enum that describes the current state of the match. Possible values are: PreMatch OnCourt WarmingUp BetweenGames PlaySuspended PointUnderInvestigation BetweenPoints PointInProgress Challenge MedicalTimeoutTeamOne MedicalTimeoutTeamTwo WalkoverCompetitorOne WalkoverCompetitorTwo WinnerTeamOneByRetirementOrDefault WinnerTeamTwoByRetirementOrDefault WinnerCompetitorOne WinnerCompetitorTwo MatchAbandoned Tie
IsReliable	Boolean	True if the data values are reliable, False otherwise
MessageTimestampUtc	DateTime	The time that the message was generated
IsCoverageCancelled	Boolean	False normally, true if coverage has been cancelled
CoverageCancelledAt	Datetime, optional	If coverage is cancelled, the time at which coverage was canceleld

Competitor

Describes a competitor in a badminton match.
{
"Id":"6546872",
"Name":"Andy Murray",
"PlayerOne":{},
"PlayerTwo":{}
}

Element	Type	Description
Id	String	An immutable ID for the competitor
Name	String	The name of the competitor
PlayerOne	Player	An object describing player one
PlayerTwo	Player	An object describing player two

Player

Describes a player in a badminton match.
{
"Id":"6546872",
"Name":"Andy Murray",
}

Element	Type	Description
Id	String	An immutable ID for the player
Name	String	The name of the player

MatchScore

An object that describes the current match score.
{
"ScoreInGames":{},
"ScoreInPoints":{}
}

Element	Type	Description
ScoreInGames	Score	An object that describes the current score in games
ScoreInPoints	Score	An object that describes the score of the current set in points

Score

An object that describes a score.
{
"CompetitorOne":6,
"CompetitorTwo":3
}

Element	Type	Description
CompetitorOne	Integer	CompetitorOne's score
CompetitorTwo	Integer	CompetitorTwo's score

Match

A collection of objects describing events so far in the match.
{
"Games":{},
"ScoreInGames":{},
"MatchWinner":{},
"StartedAtUtc":"2015-10-01T15:14:04.9551641Z",
"FinishedAtUtc":"2015-10-01T15:14:46.3875293Z"
"IsConfirmedComplete":true,
}

Element	Type	Description
Games	Integer	The number of the point being described
ScoreInGames	Score	True if the point is in sequence, false otherwise
MatchWinner	CompetitorIdentifier, optional	An object describing the winner of the match if the match has ended
StartedAtUtc	DateTime, optional	The time at which the match started. Null if this information is not available.
FinishedAtUtc	DateTime, optional	The time at which the match ended if the match has ended and the information is available, Null otherwise
IsConfirmedComplete	Boolean	The match score at the time that the point began

Match Details Message

The Details message provides details of every action that has taken place in a match.
{
"FixtureId":"3421547",
"CustomerId":6444,
"CompetitorOne":{},
"CompetitorTwo":{},
"IsDoublesMatch":false,
"CurrentServer":"CompetitorOnePlayerOne",
"CurrentScore":{},
"MatchStatus":"BetweenPoints",
"IsReliable":true,
"MessageTimestampUtc":"2015-10-01T15:15:44.9551641Z"
"IsCoverageCancelled":false
}

Element	Type	Description
FixtureId	Integer	An immutable identifier for the event
CustomerId	Integer	An immutable identifier for the customer
CompetitorOne	Competitor	An object describing competitor one
CompetitorTwo	Competitor	An object describing competitor two
IsDoublesMatch	Boolean	True if this is a doubles match, false otherwise
CurrentServer	PlayerIdentifier, optional	An enum describing the current server. Values CompetitorOnePlayerOne CompetitorOnePlayerTwo CompetitorTwoPlayerOne CompetitorTwoPlayerTwo
Match	Match	An object that describes events so far within the match
MatchStatus	MatchStatus	An enum that describes the current state of the match. Possible values are: PreMatch OnCourt WarmingUp BetweenGames PlaySuspended PointUnderInvestigation BetweenPoints PointInProgress Challenge MedicalTimeoutTeamOne MedicalTimeoutTeamTwo WalkoverCompetitorOne WalkoverCompetitorTwo WinnerTeamOneByRetirementOrDefault WinnerTeamTwoByRetirementOrDefault WinnerCompetitorOne WinnerCompetitorTwo MatchAbandoned Tie
IsReliable	Boolean	True if the data values are reliable, False otherwise
MessageTimestampUtc	DateTime	The time that the message was generated
IsCoverageCancelled	Boolean	False normally, true if coverage has been cancelled
CoverageCancelledAt	Datetime, optional	If coverage is cancelled, the time at which coverage was canceleld

Set

A collection of objects detailing every point played so far in a match.
{
"SetNumber":1,
"Points":{},
"ScoreInPoints":{},
"SetWinner":"TeamOne",
"FirstPointServer":"TeamTwo"
}

Element	Type	Description
SetNumber	Integer	The set described this this Set object
Points	Point	An array of point objects detailing the points played so far in this set
ScoreInPoints	Score	An object that describes the score of the current set in points
SetWinner	TeamIdentifier, optional	Indicates which team won the set if the set is complete, Null otherwise
FirstPointServer	TeamIdentifier, optional	Indicates which team served the first point

Point

A collection of objects describing a point.
{
"PointNumber":1,
"IsInSequence":true,
"IsConfirmed":true,
"Server":"TeamOne",
"StartedAtUtc":"2015-10-01T15:14:44.9551641Z",
"Winner":"TeamOne",
"WonAtUtc":"2015-10-01T15:14:46.3875293Z",
"ScoreWhenPointStarted":{}
}

Element	Type	Description
PointNumber	Integer	The number of the point being described
IsInSequence	Boolean	True if the point is in sequence, false otherwise
IsConfirmed	Boolean	True if the point has been confirmed, false otherwise
Server	TeamIdentifier	The team that is currently serving
StartedAtUtc	DateTime, optional	The time at which the point started. Null if this information is not available.
Winner	TeamIdentifier, optional	The team that won the point if the point is complete, Null otherwise
WonAtUtc	DateTime, optional	The time at which the point was won if the point is complete and the information is available, Null otherwise
ScoreWhenPointStarted	MatchScore	The match score at the time that the point began