input: long-tail legacy formats — umbrella (WordPerfect, MS Works, Lotus 1-2-3, Quattro Pro, HWP, AbiWord, dBase, DIF/SYLK, …)

[artiz]

Policy proposal: react to real user demand (👍 votes / comments naming a format), keep the native-parsing bar (no LibreOffice shell-out — that's upstream docling's approach, not ours).

Status	Family	Extensions	Note
✅ #358, ✅#359	WordPerfect	.wpd, .wp, .wp5, .wp6, .wpt	native parser (5.x/6.x+): text, bold/italic/underline, tables; headers/footers/footnotes not extracted; WP 4.2 and Mac 3.x refused
✅ #242	MS Works spreadsheets v3	.wks	Lotus-style record stream (BOF opcode 0xFF), content-sniffed against 1-2-3 .wks
✅#360	MS Works word processor	.wps	2.x DOS raw stream, 3–4 raw stream, 4.5+ CFB (CONTENTS); LibreOffice ships 5 libwps fixtures
⬜	MS Works 6–9 spreadsheet	.xlr	CFB, BIFF-like Workbook; partially documented
✅ #242	Lotus 1-2-3 / Symphony	.wk1–.wk4, .wks, .wrk, .123	binary spreadsheets; calamine doesn't cover them
✅#361	Quattro Pro	.wq1/.wq2, .wb1–.wb3, .qpw	DOS .wq1 probed in #242 and cut (LibreOffice reads labels at a different offset than the Lotus layout)
⬜	HWP (Hancom)	.hwp	big in Korea; CFB + documented-ish spec; the one entry here with a plausible audience — split out if requested
✅ #278	AbiWord	.abw/.zabw/.awt	XML (+gzip) — actually easy, just niche
✅ #234	dBase / interchange	.dbf, .dif, .sylk/.slk	table interchange relics
⬜	Misc DOS-era	.prn, .602, .lwp, .mw, .mcw, .cwk, .pbd, .sgl, .cgm, .et, .eth	no maintained parsers in any language