function Resolve-ConfigurationDataVariable {
    [CmdletBinding()]
    Param(
        [Parameter(Mandatory=$true)]
        [string]
        $Name,

        [Parameter(Mandatory=$true)]
        $Context
    )

    if($Context.Variables.ContainsKey($Name)){
        return $Context.Variables[$Name]
    }

    if(-not $Context.VariableDefinitions.ContainsKey($Name)){
        throw "Variable [$Name] is not defined."
    }

    if($Context.ResolvingVariables.ContainsKey($Name)){
        throw "Circular variable reference detected for variable [$Name]."
    }

    $Context.ResolvingVariables[$Name] = $true
    try {
        $Resolved = Resolve-ConfigurationDataValue -Value $Context.VariableDefinitions[$Name] -Context $Context
        $Context.Variables[$Name] = $Resolved
        return $Resolved
    } finally {
        $Context.ResolvingVariables.Remove($Name)
    }
}