Processing: * Optionally cap over-long titles in headers. * Mark bad links (not only warn at build) in flightcheck+draft mode. * Warn about possible HTML escapes in content (e.g. &#\d+; or %{HEX}). * Maybe comply with PDF/A-1b (or newer). + Include to preflight online test against e.g. * Generalize pandoc-memoir filter. + Enable matter injection conditional to environment variable. + Define Headline regexes via environment variable. * Verify that pandoc-citeproc is applied only once. Content modelling: * Use -- for en-dash and --- for em-dash, and update EDITING. * Consider use typographic enhancement tunings: + icomma - avoid automagic space after comma (e.g. money amount). + ellipsis - ensure balanced space around ellipsis. + xspace - ensure space after superscript/subscript characters. + numprint - space/comma separated enumeration. + cite - enhanced citation handling. * Support numbered lists with complex starting point. + "Mandatory Characteristics" list ideally should be 4.1.1-4.1.6. * Redirect bibtex parsing warnings/errors to STDERR. + Example: Title section containing doublequote. + ideally switch to Biber. Styling: * Use standardized layout for bibliography. + Obey csquotes in citations. * no quoting around origin link string. * Maybe visually wrap URLs in <> to distinguish trailing punctuation. * Adapt colophon for each flavor (and re-add varying type measure). * Penalize pagebreak between single line and list. Repository: * Add README * Add proper copyright and licensing + Code: AGPL-3+. + Design: CC-by-sa-4.0.