1.5 Applicability Statement
This algorithm is applicable to scenarios in which Contact object data needs to be transported between a Contact object source and a non-Contact object or indeterminate destination.
This algorithm is best avoided if 100 percent fidelity is required when transporting contact data between a Contact object source and a Contact object destination.
Note that [RFC2426] section 3.8 permits the insertion of nonstandard private values by using the extension mechanism defined in [RFC2045]. The primary requirement of these private values is that the name begins with "x-", and as such they are often termed x-components, x-props, and x-parameters. This document specifies several x-props that provide additional contact information.