Siddham is a Unicode block containing characters for the historical, Brahmi-derived Siddham script used for writing Sanskrit between the years c. 550 – c. 1200.[3]
Umamaheswaran, V. S. (2014-01-28), "Resolution M61.01 and M61.09 item a", Unconfirmed minutes of WG 2 meeting 61, Holiday Inn, Vilnius, Lithuania; 2013-06-10/14