BEADL-XML Example
For the following shown example of the implementation of the LightChasingTask, the corresponding BEADL-XML description is shown below. 
<?xml version="1.0" encoding="utf-8"?>
<BEADL version="0.1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="BEADL.xsd">
<BeadlTrialProtocol name="LightChasingTask" startState="WaitForPoke" numberOfTrials="INF">
<BeadlArguments>
<BeadlArgument name="CorrectPortNum" expression="randi(3)" comment="random integer value in range [1..3] to define the port to be used as correct port" type="numeric" />
<BeadlArgument name="RewardSize" expression="10" comment="reward size in microliter" type="numeric" />
<BeadlArgument name="ValveTime" expression="GetValveTimes(RewardSize, ValveTime)" comment="convert the reward size into a duration the reward valve needs to be opened" type="numeric" />
<BeadlArgument name="TimeOutDuration" expression="6" comment="Time out duration when the subject selected the wrong port" type="numeric" />
<BeadlArgument name="ITIDuration" expression="6" comment="Inter-Trial-Interval" type="numeric" />
</BeadlArguments>
<HardwareSettings hardware="Bpod" version="r0.5">
<ConnectionMapping name="CorrectPort" resourceName="port1" type="behavioralPort">
<Dependency type="BeadlArgumentDependency" expression="CorrectPortNum == 1" />
</ConnectionMapping>
<ConnectionMapping name="CorrectPort" resourceName="port2" type="behavioralPort">
<Dependency type="BeadlArgumentDependency" expression="CorrectPortNum == 2" />
</ConnectionMapping>
<ConnectionMapping name="CorrectPort" resourceName="port3" type="behavioralPort">
<Dependency type="BeadlArgumentDependency" expression="CorrectPortNum == 3" />
</ConnectionMapping>
<ConnectionMapping name="ErrorPort1" resourceName="port2" type="behavioralPort">
<Dependency type="BeadlArgumentDependency" expression="CorrectPortNum == 1" />
</ConnectionMapping>
<ConnectionMapping name="ErrorPort2" resourceName="port3" type="behavioralPort">
<Dependency type="BeadlArgumentDependency" expression="CorrectPortNum == 1" />
</ConnectionMapping>
<ConnectionMapping name="ErrorPort1" resourceName="port1" type="behavioralPort">
<Dependency type="BeadlArgumentDependency" expression="CorrectPortNum == 2" />
</ConnectionMapping>
<ConnectionMapping name="ErrorPort2" resourceName="port3" type="behavioralPort">
<Dependency type="BeadlArgumentDependency" expression="CorrectPortNum == 2" />
</ConnectionMapping>
<ConnectionMapping name="ErrorPort1" resourceName="port1" type="behavioralPort">
<Dependency type="BeadlArgumentDependency" expression="CorrectPortNum == 3" />
</ConnectionMapping>
<ConnectionMapping name="ErrorPort2" resourceName="port2" type="behavioralPort">
<Dependency type="BeadlArgumentDependency" expression="CorrectPortNum == 3" />
</ConnectionMapping>
</HardwareSettings>
<BeadlEvents>
<HardwareEvent eventName="CorrectPortPoke" connection="CorrectPort.poke" type="" comment="" />
<HardwareEvent eventName="ErrorPort1Poke" connection="ErrorPort1.poke" type="" comment="" />
<HardwareEvent eventName="ErrorPort2Poke" connection="ErrorPort2.poke" type="" comment="" />
</BeadlEvents>
<BeadlActions>
<HardwareAction actionName="CorrectPortLED" connection="CorrectPort.led" type="" comment="" />
<HardwareAction actionName="CorrectPortValve" connection="CorrectPort.valve" type="" comment="" />
</BeadlActions>
<BeadlStates>
<BeadlState name="WaitForPoke">
<StateTimer>inf</StateTimer>
<StateOutputActions>
<OutputAction actionName="CorrectPortLED" actionValue="on" />
</StateOutputActions>
<StateEvents>
<ExternalEvent eventName="CorrectPortPoke" eventValue="in" eventTransition="CorrectPortPoke_in" />
<ExternalEvent eventName="ErrorPort1Poke" eventValue="in" eventTransition="ErrorPort1Poke_in" />
<ExternalEvent eventName="ErrorPort2Poke" eventValue="in" eventTransition="ErrorPort2Poke_in" />
</StateEvents>
<Dependency type="BeadlArgumentDependency" expression="CorrectPortNum == 3" />
</BeadlState>
<BeadlState name="End">
<StateTimer>inf</StateTimer>
<StateOutputActions />
<StateEvents />
</BeadlState>
<BeadlState name="Reward">
<StateTimer>ValveTime</StateTimer>
<StateOutputActions>
<OutputAction actionName="CorrectPortValve" actionValue="open" />
</StateOutputActions>
<StateEvents>
<TimerEvent eventName="stateExpired" eventValue="" eventTransition="stateExpired" timer="StateTimer" />
</StateEvents>
</BeadlState>
<BeadlState name="ITI">
<StateTimer>ITIDuration</StateTimer>
<StateOutputActions />
<StateEvents>
<TimerEvent eventName="stateExpired" eventValue="" eventTransition="stateExpired" timer="StateTimer" />
</StateEvents>
</BeadlState>
<BeadlState name="TimeOut">
<StateTimer>TimeOutDuration</StateTimer>
<StateOutputActions />
<StateEvents>
<TimerEvent eventName="stateExpired" eventValue="" eventTransition="stateExpired" timer="StateTimer" />
</StateEvents>
</BeadlState>
</BeadlStates>
<BeadlStateTransitions>
<BeadlStateTransition from="Reward" to="ITI" eventTransition="stateExpired" label="" />
<BeadlStateTransition from="WaitForPoke" to="Reward" eventTransition="CorrectPortPoke_in" label="" />
<BeadlStateTransition from="WaitForPoke" to="TimeOut" eventTransition="ErrorPort1Poke_in" label="" />
<BeadlStateTransition from="WaitForPoke" to="TimeOut" eventTransition="ErrorPort2Poke_in" label="" />
<BeadlStateTransition from="TimeOut" to="ITI" eventTransition="stateExpired" label="" />
<BeadlStateTransition from="ITI" to="End" eventTransition="stateExpired" label="" />
</BeadlStateTransitions>
</BeadlTrialProtocol>
</BEADL>