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This is just a quick TAG reference for Gemini with some other important info below.
Gemini takes inspiration from gophermaps and from Markdown. The format permits richer typographic possibilities than the plain text of Gopher, but remains extremely easy to parse. The format is line-oriented, and a satisfactory rendering can be achieved with a single pass of a document, processing each line independently. ################################################ Core Line Types: ################################################ ---------------------------------------- Text Lines ---------------------------------------- * Text lines are automatically wrapped to the users viewport. * Short lines will not be combined into fewer longer lines. * Authors should avoid hard wrapping: * Text should be written in a single long line (if you with). * Clients may permit users to customise the appearance of text lines by altering the font, font size, text and background colour, etc. * KEY WORD: "MAY" (Something to keep in mind when you format) * Blank lines have no meaning. A blank space in you DOC will be formatted as a blank space. Equal to
* Authors who insist on hard-wrapping their content MUST be aware that the content will display neatly on clients whose display device is as wide as the hard-wrapped length or wider, but will appear with irregular line widths on narrower clients * Authors should not expect to exercise any control over the precise rendering of their text lines, only of their actual textual content. ---------------------------------------- Link Lines: ----------------------------------------- Lines beginning with the two characters "=>" are link lines, which have the following syntax: =>[] [ ] where: * is any non-zero number of consecutive spaces or tabs * Square brackets indicate that the enclosed content is optional. * is a URL, which may be absolute or relative. If the URL does not include a scheme, a scheme of gemini:// is implied. * As per gopher, links can only be displayed one per line, encouraging neat, list-like structure. * Gemini documents can simply and elegantly link to documents hosted via other protocols. All the following examples are valid link lines: => gemini://example.org/ => gemini://example.org/ An example link => gemini://example.org/foo Another example link at the same host =>gemini://example.org/bar Yet another example link at the same host => foo/bar/baz.txt A relative link => gopher://example.org:70/1 A gopher link ----------------------------------------- Preformatted Toggle Lines (3 backticks) ----------------------------------------- " ``` " - Toggle preformatted mode on/off. Equal to . ----------------------------------------- Preformatted Text Lines ----------------------------------------- * This is what any text written between your Toggle lines will look like. * Content such as ASCII art, computer source code, etc. which may appear incorrectly when treated as such should be enclosed beween preformatting toggle lines. * Monospace fonts automatically will be used. ########################################################### Advanced Line Types: ########################################################### *** These are more advanced line types that, more than likely, will only be recognized in more advanced (think graphical) clients. These will be represented as text lines if the client doesn't support these line types. *** ----------------------------------------- Heading Lines ----------------------------------------- # - H1 - Heading 1 - Large text ## - H2 - Heading 2 - Medium text ### - H3 - Heading 3 - Small text ------------------------------------------ Unordered List Items ------------------------------------------ * - An asterisk will create an unordered list #################################################################### OTHER NOTES TO KEEP IN MIND #################################################################### * Gemini can be used to serve plain text, rich text, HTML, Markdown, LaTeX, etc. * Connections are closed after a single transaction. * Servers should listen on port 1965 over tcp/ip * This is an unprivilleged port * Use of TLS for Gemini transactions is mandatory * Use of the Server Name Indication (SNI) extension to TLS is also mandatory, to facilitate name-based virtual hosting. * Servers MUST use TLS version 1.2 or higher and SHOULD use TLS version 1.3 or higher. Clients MAY refuse to connect to servers using TLS version 1.2 or lower. * Use UTF-8. Serving your content as UTF-8 maximises its accessibility and maximises the utility of simple clients which support only UTF-8. * As a rule of thumb, files larger than 100MiB might be thought of as best served some other way. Of course, because Gemini supports linking to other online content via any protocol with a URL scheme, it's still possible to link from a Gemini document to a large file served via HTTPS, BitTorrent, IPFS or whatever else tickles your fancy. * Gemini files are defined by .gmi and .gemini.
text/gemini
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