Extended field that was found or created.
Date and time the field was created.
Type of data the field holds.
Field description, if the field is a system field.
Display name shown in the contact list.
Indicates whether the extended field is a system field or custom field.
Extended field key.
When accessing contact data,
extended field data is available at extendedFields[key].
For example, if the key is "custom.notes",
the value can be accessed at extendedFields["custom.notes"].
key is generated when the extended field is created
and can't be modified, even if displayName changes.
Extended field namespace.
Extended fields created through by calling the Find Or Create Extended Field method
are automatically assigned to the custom namespace.
Date and time the field was last updated.