@startuml

set namespaceSeparator \\

namespace Entity {
    class Artist {}
}

namespace Html\\Form {
    class ArtistForm {
        + __construct(artist : ?Artist := null)
        + getArtist() : ?Artist
        + getHtmlForm(action : string) : string
    }
}

Entity\\Artist "0..1\n-artist"<-o  Html\\Form\\ArtistForm

@enduml