Help:Adding subobjects using the Page Forms extension

Subobjects can be added with the help of Page Forms (see this basic documentation).

Usually Page Forms works this way: if a field corresponds to a semantic property, the form will usually have the correct input type by default. For properties of type page there will be an automatic autocompletion offering values that the property already holds. If one wants to have autocompletion for subobjects too, one should add the following parameter to the field definition:

Other documentary regarding the use of Page Forms with subobjects:
 * Adding subobjects with Page Forms