Cover as little as possible to correspond to gemini (gemtex) while remaining compatible with existing web browsers. Allow implementing all targeted user application.
"<!DOCTYPE html><html" { " " lang ATTR }? "><head><meta charset='utf-8'><title>" CONTENT </title> HEAD </head><body> BODY { FORM }? BODY </body></html>
"<link rel='shortcut icon' type='image/x-icon' href='data:image/x-icon;,'><meta property='og:description' content='" CONTENT "' name='description'><meta name='viewport' content='width=device-width, initial-scale=1'>" { <link " " rel Q{ stylesheet } href URL > }*
<form NAME { " " action URL }? { " " method Q{ post } { " " enctype Q{ multipart/form-data } }? }? > BODY { <input NAME " " type Q{ file } > | <input NAME { " " value ATTR }? > | <textarea NAME > TEXT </textarea> } BODY <input " " type Q{ submit } { " " value ATTR }? > BODY </form>
{ <h1> TEXT </h1> | <h2> TEXT </h2> | <h3> TEXT </h3> | <pre> TEXT </pre> | <blockquote> TEXT </blockquote> | <ul> { <li> TEXT </li> }* </ul> | BREAK | DYNAMIC | CONTENT }*
<br> | <p> | </p> | <div> TEXT </div>
<a NAME { " " href URL }? > TEXT </a> | <script src URL { " " onerror ATTR }? ></script> | <script> TEXT </script> | <style> TEXT </style>
{ "<!--.*?-->" | TEXT }*
{ " " name ATTR }?
{ } | "=" { "\"" { TEXT1 | "'" }* "\"" | "'" { TEXT1 | "\"" }* "'" | TEXT2 }
Q{ { file | http | https | javascript } ":" TEXT1 }
Q{V}: "=" { V | "'" V "'" | "\"" V "\"" }
{ TEXT1 | "'\"\n" }*
{ TEXT2 | " " | "&" { lt | gt | amp | apos | quot | nbsp } ";" }*
"[^<>&'\"\n ]+"
https://html.spec.whatwg.org/multipage/syntax.html#elements-2
- Void elements: area, base, br, col, embed, hr, img, input, link, meta, source, track, wbr (deprecated: command, keygen, param)
- Raw text elements: script, style
- Escapable raw text elements: textarea, title
<!DOCTYPE html>
<html>
<\!-- Optionally, text, with the additional restriction that the text must not start with the string ">", nor start with the string "->", nor contain the strings "<!--", "-->", or "--!>", nor end with the string "<!-". -->
<![CDATA[...]]> is not supported, because it is XML-specific.
https://en.wikipedia.org/wiki/CDATA
- meta (charset=utf-8)
- title
- h1, h2, h3
- a (href, name)
- br (~p, ~div)
- pre
- blockquote
- ul, li
- form (name, action, enctype, method=get, method=post)
- input (type=text, name, value)
- input (type=file, name)
- input (type=submit, value)
- textarea (name)
- script (src, onerror)
With a limitation of supporting up to one of a form input or a textarea element along with a submit button and up to 1 form per web page.
id or name should be followed for fragment linking and may improve user experience by allowing to preserve scroll position, focus or form input
role=img and aria-label="..." added to a pre, blockquote or textarea should improve accessibility of ASCII art
readonly, role=status (or alert, log) and aria-live=polite (or assertive) added to a textarea might allow for status updates
- file:
- http:
- javascript:
- optional https:
- https://en.wikipedia.org/wiki/Small-C
- https://gemini.circumlunar.space/
- https://codeberg.org/Weblite/HTMLite/src/branch/master/htmlite.md
- https://smolweb.org/guidelines.html
- https://codeberg.org/smolweb/smolweb-spec
- https://smolweb.org/specs/index.html
- https://www.w3.org/TR/1998/NOTE-compactHTML-19980209/#www3-1
- https://en.wikipedia.org/wiki/I-mode#Description
As a simpler form of HTML, C-HTML does not support tables, image maps, multiple fonts and styling of fonts, background colors and images, frames, or style sheets, and is limited to a monochromatic display. Includes GIF image support.
- https://seirdy.one/posts/2020/11/23/website-best-practices/
- https://indieweb.org/progressive_enhancement
- http://eev.ee/blog/2016/03/06/maybe-we-could-tone-down-the-javascript/
- https://ar.al/2020/08/07/what-is-the-small-web/
- https://benhoyt.com/writings/the-small-web-is-beautiful/
- https://shkspr.mobi/blog/2021/01/the-unreasonable-effectiveness-of-simple-html/
1991-10-29 HTML Tags (1.0):
- http://info.cern.ch/hypertext/WWW/MarkUp/Tags.html
- https://www.w3.org/History/19921103-hypertext/hypertext/WWW/MarkUp/Tags.html
- https://lists.w3.org/Archives/Public/www-talk/1991SepOct/0003.html
1993-06 HTML 1.2:
https://www.w3.org/MarkUp/draft-ietf-iiir-html-01.txt
1993-11-08 HTML+
- https://www.w3.org/MarkUp/HTMLPlus/htmlplus_1.html
- https://www.w3.org/MarkUp/htmlplus_paper/htmlplus.html
1995-11-24 HTML 2.0:
https://datatracker.ietf.org/doc/html/rfc1866
1997-01-14 HTML 3.2:
https://www.w3.org/TR/REC-html32
1997-12-18 HTML 4.0: