structure

optionalvalue required

Defines a structure concept model. A structure is a record-like type containing any number of properties. For more information, see Modeling Concepts.

This key and its child keys must be defined in a *.model.bxb file. The file must be in the models/concepts folder.

Example

structure (Movie) {
  description ("A movie")
  property (title) {
    type (MovieTitle)
    min (Required)
    max (One)
    visibility (Private)
  }
  property (releaseDate) {
    type (time.Date)
    min (Required)
    max (One)
    visibility (Private)
  }
  property (genre) {
    type (MovieGenre)
    min (Optional)
    max (Many)
    visibility (Private)
  }
  property (posterUrl) {
    type (core.Text)
    visibility (Private)
  }
  property (backdropUrl) {
    type (core.Text)
    visibility (Private)
  }
  property (movieDetails) {
    type (MovieDetails)
    visibility (Private)
    lazy-source (FetchMovieDetails)
  }
}

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Child Keys

compile-time-resolved-by optional	Declare an action that can be called to resolve partial instances returned by another action
description optional	Adds text describing the structure, which is useful for documenting models
equivalence optional	A structure equivalence policy joins equivalence constraints together to specify how the system should compare two instances of the same concept
extends optional	You can extend a parent concept with a new child concept, which inherits all of the parent properties
features optional	Marks a concept with special concept features for user preferences, privacy, or security
named-consumer optional	Named consumers allow explicitly linking a concept to an action
natural-order optional	Specifies how to sort instances of the concept
property optional	Properties define a has-a relationship between concepts
role-of optional	There are cases where you want to assign a specific role to a feature, but not extend the feature
sort-orderings optional	Collection of named orderings defined for the structure concept

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structure

Example

Child Keys