Overview
This is a field which can be used for a single choice, or multiple choices, from a list. The values for this field are set by the 'choices' property. The 'choices' property is also used to receive input in a Rich UI application through field bindingvalue property determines what selected option value will be populated in the field when the program gets the screen input. When the program outputs to the screen, it attempts to match what is in the 'value' field to an option in the select box. If no match is present the first options is selected. The list of choices can be loaded in a variety of ways, please see below for more detail.
Validation (Rich UI Only)
...
To find more information on the choice selection criteria and choices parameter properties, view the Parameter Markers section here.
Blank Option
The blank option property allows you to provide a option containing blank text before any other choices from the database file are displayed.
Blank Option Label
By default the blank option label contains no text. This property allows a specific text to be provided to display in the initial blank option. If the initial 'blank' option is submitted with the alternate text the value will be sent to the program as a blank value.
Both of the blank option properties can only be used with a Database-Driven selection
Both 'blank option' and 'blank option label' properties may be assigned to a bound field. (Rich UI only).
Max Choices
The max choices property allows you to set the number of choices you will see from your database-driven selection. There is no limit to the number of choices you can show, however if there is no limit set the default is 10.
...