legend: keywords, user input

_italic_, i__tali__c, *bold*, b**ol**d, `monospace`, mo``no``space, ^^superscript^, ~_subscript~, '`single quoted`', "`double quoted`", \*not-bold*, [red]#styled#, s[small]##tyle##d,

:attribute: value | {set:attribute:value} → {attribute} = value
:attribute!: | :!attribute: | {set:attribute!} → {attribute} = {}
:attribute-missing: [skip | drop | drop-line | warn]
:attribute-undefined: [drop | drop-line]
\{not-reference}

{counter:name} | {counter:name:init} → print ++name-value
:!name: → {}
{counter2:_name_} → ++name-value

= Document title: subtitle
:toc: [auto | preamble | left | right | macro (toc::[])]
:toc-title: text
:toclevels: [0-5]
preamble-text
== Level 1
[discrete] - no structure and TOC
== Level 1
:sectnums:
=== 1.1. Level 2
:leveloffset: +2
== 1.1.1. Level 3
:sectnumlevels: 2
== Level 3
[colophon | abstract | preface | dedication | part introduction | appendix | glossary | bibliography | index]
== Styled level 3

:idprefix: char
:idseparator: char
:sectids: :sectanchors: :sectlinks:
:appendix-caption: text
 

= {doctitle}{title-separator} subtitle
{firstname} {middlename} {lastname} <{email}>; {firstname_2} {lastname_2} <{email_2}>
{revnumber}, {revdate}: {revremark}

{author} - {firstname} {middlename} {lastname}
{authors} - {author}, {author_2}
{authorinitials} - fml

:description: :keywords: :title: :version-label: :copyright: :orgname:

:docinfo: :docinfo1: :docinfo2:

:no-header-footer: :noheader: :nofooter: :notitle: :showtitle: :fragment:

.title (no space after .)
[[id]]
[block-name, block-attributes]
delimeter
block-text
delimeter

paragraph 1
paragraph 1

paragraph 2

:hardbreaks: | [%hardbreaks] | paragraph 1 + paragraph 2

''' | --- | - - - | *** | * * * - hline
<<< - page break
// - comment

ifdef::variable[] | ifndef::variable[]
endif::variable[] | endif::[]
ifdef::variable[inline_text]

ifdef::first,second[] - any
ifdef::first+second[] - all

ifeval::[{sectnumlevels} > 1]
ifeval::["{backend}" == "html5"]
== != < > <= >=

[square | circle | disc | none | unstyled]
* unordered 1
** unordered 1.1
//
* unordered 2
- unordered 3
+
unordered 3 text
- [*] checked
- [x] checked
- [ ] not checked

[arabic | decimal | decimal | decimal-leading-zero | loweralpha | lower-alpha | upperalpha | upper-alpha | lowerroman | lower-roman | upperroman | upper-roman | lowergreek,
start=n]
. ordered

[horizontal]
term:: definition
   subterm::: definition

[cols, format=[csv | dsv | psv],
separator=['|' | '!' | char],
options=[header | footer | breakable | unbreakable | autowidth],
frame=[topbot | sides | none | all],
grid=[rows | cols | none | all],
caption, width,
align=[left | right | center],
float=[left | right] ]
|===
cell-spec|cell[1,1]    cell-spec|cell[1,2]

cell-spec|cell[2,1]
cell-spec|cell[2,2]
|===

cols="3*" = "1,1,1" = "33%,33%,33%" <^> - halign, .<^> - valign a - asciidoc, e - emphasis, h -header, d - default l - literal, m - monospaced, s - strong, v - verse

cell-spec: n* - repeat, n+ - colspan, .n+ - rowspan, <^>, .<^>, aehdlmsv

http, https, ftp, irc, mailto, e@mail.com
link:url[text, target, role]

id=[id | external-file#id]
[[id]] | anchor:id[ref-text] | [[id, ref-text]]
…​
<<id, ref-text>> | xref:id[ref-text]

include::file.txt[leveloffset=+-n,
lines=7;14..25;28..-1,
indent=n,
tags=tag1;tag2]
(# tag::tag1[] …​ # end::tag1[])

<<bib-item>>.
…​
[bibliography]
- [bib-item] <description>

text.footnote:[text]
text.footnoteref:[id, text]
text.footnoteref:[id]

:figure-caption: :imagesdir:
image:inline.jpg[]
image::file.jpg[alt]
image::file.jpg[caption, title, alt, width, height, link,
float=[left | right],
align=[text-left | text-right | text-center],
role=[left | right | th | thumb | related | rel],
pdfwidth, scaledwidth, scale ]

pdfwidth (pdf), scaledwidth (docbook), scale (docbook) - n[pt(def) | px | pc | cm | mm | in | % | vw]

video::file.mp4[title, width, height, start, end, poster, theme, lang,
options=[autoplay | loop | modest | nocontrols | nofullscreen] ]
video::rPQoq7ThGAU[youtube | vimeo]

audio::file.mp3[options=[autoplay | loop | controls | nocontrols] ]

[quote, attribution, citation title and information]
____
quote
____

"quote"
-- attribution, citation title and information

> > quote
> quote

[verse, attribution, verse title and information]
____
verse
____

:source-highlighter: [pygments | coderay | highlightjs | prettify]
:source-language:

[source,language]
----
code <1>
----
<1> - callout (<!--1--> for xml)

```language
code // <2>
```
<2> - non-selectable (// # ;;)

admonition=[NOTE | TIP | IMPORTANT | WARNING | CAUTION]

[admonition]
text
admonition: inline-text

:stem: [latexmath | asciimath (def)]

[stem | asciimath | latexmath]
++++
math
++++

stem:[sqrt(4) = 2]
latexmath:[C = \alpha + \beta Y^{\gamma} + \epsilon]

:icons: font
icon:name[size=[nx | lg | fw],
rotate=[90 | 180 | 270],
flip=[horizontal | vertical],
link, window, alt, width, height, title, role ]

[type, generated-file-name, image-format]
....
diagram text
....

type::source-file[generated-file-name]

type=[actdiag | blockdiag | ditaa | graphviz | meme | mermaid | nwdiag | packetdiag| plantuml | rackdiag | seqdiag | shaape | wavedrom ]
image-format=[gif | png | svg | txt]

asciidoctor -r asciidoctor-diagram file

:autofit-option: :pagenums: :pdfmark:
:chapter-label: Chapter
:front-cover-image: image:cover.pdf[]
:back-cover-image: image…​
:media: [screen | print | prepress]
:page-background-image: image…​
:pdf-page-layout: [portrait | landscape]
:pdf-page-size: [name | w x h]
:text-alignment: [left | right | center]
:title-logo-image: image…​
:title-page-background-image: image…​

:pdf-stylesdir: :pdf-style: :pdf-fontsdir:

asciidoctor-pdf file |
asciidoctor -b pdf -r asciidoctor-pdf file

:appendix-caption:
:caution-caption:
:chapter-label:
:example-caption:
:figure-caption:
:important-caption:
:last-update-label:
:listing-caption:
:manname-title:
:note-caption:
:preface-title:
:table-caption:
:tip-caption:
:toc-title:
:untitled-label:
:version-label:
:warning-caption:

:imagesdir: ./images
:iconsdir: ./icons
:stylesdir: ./styles
:scriptsdir: ./js

{asciidoctor} {asciidoctor-version}
{backend} {basebackend}
{docdate} {docdatetime}
{docdir} {docfile}
{docname} {doctime}
{doctype} {embedded}
{filetype} {htmlsyntax}
{localdate} {localdatetime} {localtime}
{outdir} {outfile} {outfilesuffix}
{safe-mode-level} {safe-mode-name} {safe-mode-unsafe} {safe-mode-safe} {safe-mode-server} {safe-mode-secure}
{user-home}

subs=[none | normal | verbatim | specialchars | specialcharacters | quotes | attributes | replacements | macros | post_replacements]

(C) - ©
(R) - ®
(TM) - ™
-- - —
... - …​
-> - →
=> - ⇒
<- - ←
<= - ⇐
Sam's - Sam’s

:experimental:
kbd:[F11] - keyboard image
menu:Menu[Submenu > Item]
btn:[OK] - buttons