xos/exampleservice.xproto

option app_label = "exampleservice";
option name = "exampleservice";

message ExampleService (Service){
    option verbose_name = "Example Service";
    required string service_message = 1 [help_text = "Service Message to Display", max_length = 254, null = False, db_index = False, blank = False];
}

message Color (XOSBase){
     option verbose_name = "Color";
     required string name = 1 [help_text = "Name for this color", db_index = False, max_length = 256, null = False, blank = False];
     required string html_code = 2 [help_text = "Code for this color", db_index = False, max_length = 256, null = False, blank = False];
}

message ExampleServiceInstance (TenantWithContainer){
     option verbose_name = "Example Service Instance";
     required string tenant_message = 1 [help_text = "Tenant Message to Display", max_length = 254, null = False, db_index = False, blank = False];
     optional manytoone foreground_color->Color:serviceinstance_foreground_colors = 3 [db_index = True, null = True, blank = True];
     optional manytoone background_color->Color:serviceinstance_background_colors = 3 [db_index = True, null = True, blank = True];
}

message EmbeddedImage (XOSBase){
     option verbose_name = "Embedded Image";
     required string name = 1 [help_text = "Name for this image", db_index = False, max_length = 256, null = False, blank = False];
     required string url = 2 [help_text = "URL for this image", db_index = False, max_length = 256, null = False, blank = False];
     optional manytoone serviceinstance->ExampleServiceInstance:embedded_images = 3 [db_index = True, null = True, blank = True];
}