Editing 4DOS (section)

==References==
{{Reflist|refs=
<ref name="License">{{cite web |title=4DOS 7.50.1 |date=2006-11-13 |type=README.TXT |url=http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/util/user/4dos/7.50.1/4dos7501.zip |url-status=live |archive-url=https://web.archive.org/web/20160303181709/http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/util/user/4dos/7.50.1/4dos7501.zip |archive-date=2016-03-03}}</ref>
<ref name="Hall">{{cite web |url=http://sourceforge.net/forum/forum.php?forum_id=634635 |first=James F.|last=Hall |author-link=Jim Hall (computer programmer) |title=4DOS announcement}}{{dead link|date=September 2017}}</ref>
<ref name="OpenSource">{{cite web |title=4DOS released as open source software |first=James F. |last=Hall |author-link=Jim Hall (computer programmer) |work=freedos-devel |date=2006-11-14 |url=http://sourceforge.net/mailarchive/message.php?msg_id=1163523328.3263.35.camel%40x94-129-196.oit.umn.edu  |url-status=dead |archive-url=https://web.archive.org/web/20080404122428/http://sourceforge.net/mailarchive/message.php?msg_id=1163523328.3263.35.camel%40x94-129-196.oit.umn.edu |archive-date=2008-04-04}}</ref>
<ref name="Revived">{{cite web |title=Welcome to the Revived 4DOS! |url=http://4dos.hit.bg/ |url-status=dead |archive-url=https://web.archive.org/web/20091226144809/http://4dos.hit.bg/ |archive-date=2009-12-26}}</ref>
<ref name="4DOS_8.00_HELP">{{cite book |title=4DOS 8.00 online help|first1=Hardin|last1=Brothers|first2=Tom|last2=Rawson|first3=Rex C.|last3=Conn|first4=Matthias R.|last4=Paul|first5=Charles E.|last5=Dye|first6=Luchezar I.|last6=Georgiev |date=2002-02-27}}</ref>
<ref name="JP_1989_DESC">{{cite web |title=Technical Note – Using DESCRIPT.ION |date=1989 |publisher=JP Software Inc.|location=Chestertown, Maryland, US |url=https://jpsoft.com/ascii/descfile.txt |url-status=dead |archive-url=https://web.archive.org/web/20160318122322/https://jpsoft.com/ascii/descfile.txt |archive-date=2016-03-18}}</ref>
<ref name="Optimasc_2006">{{cite web |title=4DOS/4NT Description file extensions proposal |first=Carl Eric|last=Codère|date=2006-12-23 |orig-date=2004-09-14 |publisher=Optima SC Inc. |id=SPC-S200401-00 |url=http://www.optimasc.com/products/fileid/4dos-descext.pdf |access-date=2023-11-28 |url-status=live |archive-url=https://web.archive.org/web/20231128214400/http://www.optimasc.com/products/fileid/4dos-descext.pdf |archive-date=2023-11-28}}</ref>
<ref name="Stackoverflow_2009">{{cite web |title="descript.ion" file spec? |author=DVK |date=2018-03-13 |orig-date=2009-11-27 |website=stackoverflow.com |url=https://stackoverflow.com/a/15808848/2576070 |access-date=2023-11-28 |url-status=live |archive-url=https://web.archive.org/web/20231128214537/https://stackoverflow.com/questions/1810398/descript-ion-file-spec/15808848#15808848 |archive-date=2023-11-28}}</ref>
<ref name="Paul_2001_CPI">{{cite web |title=Format description of DOS, OS/2, and Windows NT .CPI, and Linux .CP files|first=Matthias R.|last=Paul |date=2001-06-10|ref=none|edition=1.30 |orig-date=1995 |url=http://www.columbia.edu/~em36/wpdos/MatthiasPaulCPI.zip<!-- not an official distribution archive, but contains an older version of CPI.LST --> |access-date=2016-08-20 |url-status=dead |archive-url=https://web.archive.org/web/20160420065252/http://www.columbia.edu/~em36/wpdos/MatthiasPaulCPI.zip |archive-date=2016-04-20}} (NB. As a usage example this archive contains a DESCRIPT.ION file defining some [[key=value pair]]s as '#'-style [[extended attribute]]s. It also contains a CPI file analyzer & decompiler named CPI.EXE, which happens to be a CUI_LIB-enabled DOS executable optionally supporting many [[pseudo-environment variable]]s defined in '%'-style DESCRIPT.ION file entries.)</ref>
<ref name="Paul_2001_NECPINW">{{cite web |title=Specification and reference documentation for NECPINW |edition=2.08<!-- Newer 3.xx revisions exist as well --> |work=NECPINW.CPI – DOS code page switching driver for [[NEC Pinwriter]]s |at=FILESPEC.TXT from NECPI208.ZIP |first=Matthias R.|last=Paul |date=2001|ref=none|orig-date=1996 |url=https://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/util/print/cpi/NECPI208.ZIP<!-- http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/util/print/cpi/ --> |access-date=2013-04-22 |url-status=live |archive-url=https://web.archive.org/web/20170910202610/http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/util/print/cpi/NECPI208.ZIP |archive-date=2017-09-10}}<!-- https://web.archive.org/web/20090215001349/http://www.uni-bonn.de:80/~uzs180/mpdokeng.html#M.NECPINW --> (NB. As a usage example this archive contains a DESCRIPT.ION file defining some [[key=value pair]]s as '#'-style [[extended attribute]]s.)</ref>
}}