RFC 5988 standardized a means of indicating the relationships between resources on the Web. This specification defines a pair of reciprocal link relation types that may be used to express the relationship between a collection and its members. Editorial Note (To be removed by RFC Editor) Distribution of this document is unlimited. Comments should be sent to the IETF Apps-Discuss mailing list (see <https://www.ietf.org/mailman/listinfo/apps-discuss>).