Dr.Ken Lunde
For those who are not aware, IVSes (Ideographic Variation Sequences) are a standardized Unicode mechanism for representing otherwise unencoded variant forms of CJK Unified Ideographs using “plain text,” specifically via a sequence of a Base Character (aka, a CJK Unified Ideograph) followed by a Variation Selector (one of the 240 in Plane 14). This sequence maps to a glyph that corresponds to a registered IVS, which is part of a registered IVD (Ideographic Variation Database) Collection.