rig 'dzin brda brgyud

From RangjungYesheWiki

vidyadhara sign transmission lineage [IW]

indication transmission of knowledge-holders [JV]

the symbolic transmission of the Vidyadharas, vidyadhara symbolic transmission, Vidyadhara Sign Transmission Lineage, transmission of symbols through the wisdom-holders; lineage of the bearers of pure awareness [RY]

Sign Lineage of the Vidyadharas. The second of the three lineages [RY]