Parameters can have default values when parameters are not given an explicit value during component instantiation.

Types

JSON-LD Shortcut	URI	Description
/	oo:DefaultScoped	A parameter value that is scoped in a certain component (and its subcomponents).

Predicates

JSON-LD Shortcut	URI	Domain → Range	Description
default	oo:defaultValue	oo:Parameter → ?	Sets a default parameter value, which is overridable during instantiation.
defaultScoped	oo:defaultScoped	oo:Parameter → oo:DefaultScoped	Adds a scoped default value to the parameter.
defaultScope	oo:defaultScope	oo:DefaultScoped → oo:Component	Defines the scope of a scoped value.
defaultScopedValue	oo:defaultScopedValue	oo:DefaultScoped → ?	Defines the value of a scoped value.

Example: Default

MyModule/MyComponent#MyParam1 is a parameter with a default value in all cases:

{
  ...
  "@id": "ex:MyModule/MyComponent#MyParam1",
  "default": "this is the default value"
}

Example: Default Scoped

MyModule/MyComponent#MyParam2 is a parameter with a default value that is scoped to only be applicable on component MyModule/MyComponent:

{
  ...
  "@id": "ex:MyModule/MyComponent#MyParam2",
  "defaultScoped": {
    "defaultScope": "ex:MyModule/MyComponent",
    "defaultScopedValue": "this is the default value for MyComponent"
  }
}

Example: Combined Defaults

MyModule/MyComponent#MyParam3 is a parameter with different value scopes and a fallback default:

{
  ...
  "@id": "ex:MyModule/MyComponent#MyParam3",
  "defaultScoped": [
    {
      "defaultScope": "ex:MyModule/MyComponent1",
      "defaultScopedValue": "this is the default value for MyComponent1"
    },
    {
      "defaultScope": "ex:MyModule/MyComponent2",
      "defaultScopedValue": "this is the default value for MyComponent2"
    }
  ],
  "default": "this is the default value for all other components"
}

Example Source