@startuml

' hide the spot
hide circle

' avoid problems with angled crows feet
skinparam linetype ortho

entity "user" as user {
  *user_id : number <<generated>>
  --
  *nickname : text
  *pronouns : text
  *address_1_name: text
  *address_2_additional: text
  *address_4_street: text
  *adress_house_number: text
  *adress_city_code: text
  *adress_country: text
  *Ehrenaemter: text
  *gravatar_email : text
  *Freitext: text
}

entity user_skill {
user_id: id
skill_id: id
--
level: number
}

entity user_language {
user_id: id
language_id: id
--
level: number
}

entity skill {
  skill_id
--
  *name: text
}

entity user_experience {
  user_id
--
  description
  start: date
  end: date
}

entity user_search_topic {
user_id
topic_id
}

entity user_contact {
user_id
contact_type_id
--
content_: text
}

entity topic {
  topic_id
--
  *name: text
}

entity language {
    id
  --
    name: text
}

entity experience {
    id
  --
    name: text
}

entity contact_types {
  id
--
  name
}

user ||--o{ user_skill : user_has_skills
user_skill ||-o{ skill
user ||--o{ user_experience : user_has_experience
user_experience ||-o{ experience : user_experience_is_tagged_with
user ||-o{ user_language : user_speaks_language
user_language||-{ language
user ||-o{ user_search_topic
user_search_topic ||-o{ topic

@enduml