data VertexMapping = VertexMapping {
    componentType :: String,
    elevationAttribute :: String,
    terminals :: [TerminalPair]
}

data TerminalPair = TerminalPair {
    inputTerminal :: String,
    outputTerminal :: String
}

data EdgeMapping = EdgeMapping {
    componentType :: String,
    bidirectional :: Boolean,
    lengthAttribute :: String,
    diameterAttribute :: String,
    terminals :: [TerminalPair]
}