Hidden field. Its value may contain the parameter of script variable which is not subject to edit.
<item type="hidden" name="VAR4" value="data"/>
List of attributes:
Includes the name of script variable which has to contain capital letters and numbers
For example: SENS1 or VAR5
The value of a variable. Names of script variables that exist in the form could be added to the value. These names will be changed into values entered into these fields. Name should be enclosed in percent symbols.