Dajnko introduced his alphabet in 1824 in his book Lehrbuch der windischen Sprache (Slovene Textbook).[2] In 1825, Franc Serafin Metelko came up with a similar proposal, complicating the issue.[3] After 1834 it gradually came out of use with the adoption of a slightly modified version of Gaj's Latin alphabet as the new Slovene script and was in 1839 officially abolished.In addition, he invented two extra symbols, which were omitted after 1829 (see table below): Dajnko's alphabetical order was as follows:The IETF language tags have assigned the variant sl-dajnko to Slovene in the Dajnko alphabet.