This document describes the serialization of the lexical markup framework (LMF) model defined as an XML model compliant with the Text Encoding Initiative (TEI) Guidelines. This serialization covers the classes of ISO 24613‑1 (the LMF core model) as well as classes provided by ISO 24613‑2 (the machine readable dictionary, MRD, model) and ISO 24613‑3 (the etymological extension).