Dear gang, Just documented the following in the wiki: https://wiki.contextgarden.net/Export#Suppressing_Presentation_Forms_in_Arab... For those who use certain commercial Arabic-script fonts with XML export: In the course of ConTeXt processing, many standard codepoints from the U+600 block are substituted with those from a subset of Presentation Forms B, which breaks the input in critical ways. Many thanks to Hans for pointing out this simple way to solve the issue. For details, see the link above. Best wishes Idris -- Idris Samawi Hamid, Professor Department of Philosophy Colorado State University Fort Collins, CO 80512