Entities and concept hierarchy in a web app

    Modules
      System
        Version
        Manual
          ManualProvider
            Actions
            Messages
        GUIDProvider
          GUID
      UI
        Route
          Params
      Adapter
        Version
          AdapterProvider
            Actions
            Messages
      User
        Identity
          AuthProvider
              Actions
              Messages
      Group
        AuthProvider
      Permission
        Vault
          Actions
          Messages
      Event
        LogProvider
          Actions
          Messages
          UI
      Dataset
        DataType
          TimeStamp /yyyy/M/d/h/m/s/f/t/z/
          GUID /[azAZ].../
          Entry {
            PK: GUID
            body: string
            created: TimeStamp
            updated: TimeStamp
          }
          user = {
            PK: GUID
            email: string
            name: string
          }
          error = {
            PK: GUID
            audience: 'developer'|'client'|'customer'
            log: boolean
            expires: Date
          }
          UserAttribute = {
            PK: GUID
            confirmed: boolean
            type: 'email'
          }
          Event {
            PK: GUID
            type: string
            time: string
            expires?: TimeStamp
            revert?: {
              id
              type
              data
            }
          }
        StorageProvider
          Actions
          Messages
          UI

    CSS
      locale
        audience
          user
            theme
              node
                layout
                transition
                background
                foreground
                skew
                filter
                brush
                stroke
      resource
        font
        canvas