RELTYPE

Purpose: To specify the type of hierarchical relationship associated with the calendar component specified by the property. The possible relationship types are defined in the enum Reltype. Use e.g. Reltype.PARENT.name to put a correct String value in this field. Other values and null-values are allowed, but will not be processed by the app. see [https://tools.ietf.org/html/rfc5545#section-3.8.4.5] and [https://tools.ietf.org/html/rfc5545#section-3.2.15] Type: String