@startuml
abstract class Bot
class TelegramBot
class TwitterBot 

Bot <|-- TelegramBot
Bot <|-- TwitterBot

class Gateway
class MetaMetaPersistence
class MetaPersistence

package nlp {

class "rasa-ai"
class "drools"
class "Google Cloud Speech API"
class "Google Cloud Natural Language"
class "Microsoft Azure Spracherkennungs-API"
class "Microsoft Azure Textanalyse-API"
"Google Cloud Speech API" -> "Google Cloud Natural Language"
"Microsoft Azure Spracherkennungs-API" -> "Microsoft Azure Textanalyse-API"
}

Gateway -- nlp

Bot "1..*" -- Gateway

Gateway -- MetaMetaPersistence

class Registry

Gateway "1" -- "1" Registry
Registry -- MetaPersistence

abstract class Service

class MensaService
Service <|-- MensaService
Service <|-- WetterService

Registry "1" -- "*" Service
@enduml