NameDescriptionTypeAdditional information
CustomFieldId

Id of target field

integer

None.

DateValue

Datetime value

date

None.

DoubleValue

Double value

decimal number

None.

LongValue

Long value

integer

None.

TextBoxValue

Text, Multi-line text, ID or URL field value

string

None.

CheckBoxValue

Checkbox

boolean

None.

FieldItem

Drop-down selected item

UserCustomFieldItemData

None.