Deutsche Telekom LabN Consulting, L.L.C. This document defines two modules that support the association of tags with modules. Tags may be included in a module or associated with a module through the use of an augmentation to YANG library that is defined in this document. The expectation is for such tags to be used to help classify and organize modules. Tags may be standardized and assigned during module definition; assigned by implementations; or dynamically defined and set by users. This document provides guidance to future model writers and, as such, this document updates [I-D.ietf-netmod-rfc6087bis].