Question Design

Property	Type	Description
key	string	Question identifier to be used in form data
label	string	Question title
controlType	string	input, select, truefalse, file
required	boolean	Whether question is required
type	string	HTML Input Types
pattern	string	Length of text
options	string	Sources for options of select control type
helperText	string	Help text to be put below question field
target	string	file, directory for file control type
multiple	boolean	Allow multiple selection for file control type
filter	FileFilter	File type filter for file control type

Text input

{
    "key" : "participant_id_number", 
    "label" : "Participant ID Number", 
    "required" : true, 
    "order" : 2, 
    "controlType" : "input", 
    "type" : "text", 
    "helperText" : "Participant ID number part, must be 3 digits, number only.", 
    "pattern" : "3"
}

You may also use any input type that is supported in the HTML Input Types.

Select

{
    "key" : "participant_id_prefix", 
    "label" : "Participant ID Prefix", 
    "required" : "true", 
    "order" : 1, 
    "controlType" : "select", 
    "options" : "__config::participant_id::prefix__", 
    "helperText" : "SN for screening visit; STP for enrolled."
}

The options value is used to retrieve data from study configuration. It must starts with __ and ends with __ . If this data is stored in nested field, these field names must be separated by ::.

File

{
    "key" : "file", 
    "label" : "Sample File", 
    "required" : true, 
    "order" : 1, 
    "controlType" : "file", 
    "helperText" : "HDF5 file", 
    "multiple" : false, 
    "filter" : [
        {
            "name" : "HDF5 file", 
            "extensions" : [
                "h5"
            ]
        }
    ]
}