<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (February 2018) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (February 2018) (Learn how and when to remove this template message) </Td> </Tr> <P> Diwani is a calligraphic variety of Arabic script, a cursive style developed during the reign of the early Ottoman Turks (16th century - early 17th century). It was invented by Housam Roumi and reached its height of popularity under Süleyman I the Magnificent (1520--1566). </P> <P> It was labeled the Diwani script because it was used in the Ottoman diwan and was one of the secrets of the sultan's palace . The rules of this script were not known to everyone, but confined to its masters and a few bright students . It was used in the writing of all royal decrees, endowments, and resolutions . A Diwani text adorned with a tugrah, a complex calligraphic seal, represented the authority of the Sultan and the Ottoman state . </P>

What do you mean by the term dewani