jats) • commonmark (CommonMark Markdown) • commonmark_x (CommonMark Markdown with extensions) • creole (Creole 1.0) • csljson (CSL JSON bibliography) • csv (CSV table) • tsv (TSV table) • djot (Djot markup) library is available by default. To see a sample custom reader: pandoc --print-default-data-file creole.lua If you want your custom reader to have access to reader options (e.g. the tab stop setting)