Similar to #ELEMENT:FORM. This type of ITEM is used to embed a sub-FORM into a parent FORM.

The main differences with #ELEMENT:FORM are:

The ITEMS enclosed in the TRAINER ITEM should always be displayed in a popup dialog in the client application.
It is possible to define a number of repetitions. The purpose of this property is to repeat the The ITEMS enclosed in the TRAINER ITEM as many times as desired.

TITLE		DATA_CODE	QUESTION TYPE	COMMENTS
Title of Question		TITLE	TEXT AREA	This is the text to be shown when the FORM is not being edited
Title of Question on edit		TITLE_ON_EDIT	TEXT AREA	This is the text to be shown when the FORM is being edited (the user is answering the question)
Title format		LITERAL_FORMAT	JSON	Format attributes for the TITLE. For information about the contents of the JSON see ITEM TEMPLATE OBJECT#LITERAL_FORMAT
Arrangement		ARRANGEMENT	JSON	Attributes to define the arrangement of the question & answer in the screen. For information about the contents of the JSON see ITEM TEMPLATE OBJECT#ARRANGEMENT
Condition		CONDICION	TEXT
Visibility condition		VISIBILITY_CONDITION	TEXT	Condition to determine whether this ITEM can be viewed by the active USER or not. In run-time, if this condition evaluates to 'false' then the ITEM will not be returned by API functions like form_get_summary() (but it is still considered to exist in the FORM)
Formula		FORMULA	TEXT	A text or FORMULA that may be used as a reference to the embedded FORM. It can be a FORM_CODE or directly a FORM REF value
Hidden		HIDDEN	VERTICAL_RADIO
Repetitions		REPETITIONS	TEXT	Number or FORMULA to indicate how many times the ITEMs in the embedded FORM should be repeated
Images
ARRAY OF 2 QUESTION	Image	ITEM_IMAGE	JSON	Contains a reference to a LIBRARY RESOURCE OBJECT. Used to associate a picture to this ITEM. To get further information about the format of the JSON string see LIBRARY RESOURCE INFO (JSON)
	Formula	ITEM_IMAGE_FORMULA	TEXT	Allows to define a FORMULA that will be used to calculate the reference of the IMAGE associated to this ITEM. If the evaluation of the FORMULA returns NULL or an invalid image reference, then the default image uploaded in the property ITEM_IMAGE will be used. Introduced in API Version 2.7.20
	Order of image	ITEM_IMAGE_ORDER	NUMERICAL

Browser not supported