@startuml
skinparam monochrome true
skinparam packageStyle rectangle
skinparam shadowing false

title System Sequence Diagram (SSD)

autonumber

actor "Organization Employee" as Employee
participant ":System" as System

activate Employee

    Employee -> System : asks to publish an announcement
    activate System

        System --> Employee : requests data
    deactivate System

    Employee -> System : Select the property type
    activate System

        System --> Employee : presents the data to be filled in by the type of property

    deactivate System

    Employee -> System : insert the requested data (size, location, distance from the city center, number of bedrooms, number of bathrooms, price commission)
    activate System

        System --> Employee : validate the data
    deactivate System

    Employee -> System : submits data
    activate System

        System --> Employee : displays operation success
    deactivate System

@enduml