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= Style guidelines

:toc:
:toc-placement: preamble

When contributing to the Qpid Dispatch Router documentation, use the _IBM Style Guide_. You can also use the following guidelines for quick reference.

== General styles

.General Quick Reference
[cols="33%,33%a,33%a",options="header"]
|===
|Item |Use |Not
|Filesystem names and paths, symbols, and literals.  | \`filename`  |
|GUI items (_Match the capitalization of the button_)  |\*bold*  |
|Navigation link text |\*bold*  |
|Superuser console commands  | $ sudo  |#
|Emphasis  |\_yay_  |\*yay*
|List of options (_underline the default if there is one_)  |1\|[.underline]\#2#\|3 |1/2/3
|Decimal integers < 10  |four  |4
|Decimal integers >= 10  |12  |twelve
|Hexadecimal integers (_always numeric, lowercase x_) |0x123 |0X13
|Number ranges (_always use numerals_)  |1-20 |1-twenty
.3+|Do not use Latin abbreviations  |that is |i.e.
|and so on |etc.
|for example  |e.g.
|Cannot  |cannot  |can not
|And |and | &
.2+|Choices |and |and/or
|or |
|Heartbeating |heartbeating |heart-beating
|===

.Additional general guidelines
* Stick to one file per chapter unless the content is too long,
  excluding reusable topics.
* Don't use contractions, ;).
* Document IDs are book-scoped, so they don't need the book title in
  them.
* Terminate bulleted and numbered lists with periods unless the items
  listed are simple names.
* The words "server" and "broker" are not capitalized unless they
   begin a sentence or appear in a title.
* Avoid the word "simply" unless it clarifies.
* For substitution of `{attr}` in code blocks, use `[subs=+attributes]`.
* For styling of `++*bold*++` (`*bold*`) in code blocks, use
  `[subs=+quotes]`.
* Do not use the word 'the' before 'Broker'. It is just 'Broker'

== Styling headings and titles

In headline-style capitalization, capitalize the initial letter of the following words:

* The first and last words of the text
* All nouns, pronouns, adjectives, verbs, adverbs, and subordinating conjunctions, such as 'after', 'although', 'because', 'before', 'how', 'if', 'than', 'that', 'though', 'until', 'when', 'where', 'whether', and 'while'
* Any word in a hyphenated compound that is not an article, preposition, or coordinating conjunction
* The last word in a hyphenated compound, regardless of its part of speech

In headline-style capitalization, do not capitalize the initial letter of the following words:

* Articles, except as the first word
* Coordinating conjunctions
* Prepositions, except as the first or last word
* The 'to' in an infinitive

NOTE: To learn more about Headline-style titles see, the _Capitalization_ section in Chapter 1 of the _IBM Style Guide_.

.Headings Quick Reference
[cols="33%,33%a,33%a",options="header"]
|===
|Item |Use |Not
.2+|Section headings .2+|Configuring the System with Fedora
|Configuring the system with Fedora
|Configuring The System With Fedora
|Procedure Titles (_gerund_) |Configuring | Configure
.2+|Table and block titles .2+|This is an Example
|This is an example
|This Is An Example
.2+|Hyphenated headings .2+| Configuring Point-to-Point Messaging | Configuring Point-To-Point Messaging | Configuring Point-to-point Messaging
.2+|Document IDs .2+|\[[this_heading_here]]
|\[[this-heading-here]]
|\[[ThisHeadingHere]]
|Unnumbered titled sections |_[discrete]_ |
|===

== Styling replaceables

.Replaceables Quick Reference
[cols="50%,50%a",options="header"]
|===
|Item |Use
|Replaceable value |\`\_SOME_VAR_`
|Location of broker instance |\`\_BROKER_INSTANCE_DIR_`
|Component install directory |\`\_INSTALL_DIR_`
|===

TIP: If using a replaceable within a source block, you will need to add
`subs="+quotes"`` to the source tag for it to render. (For example : `++[source,options="nowrap",subs="+quotes"]++`).

.Additional Replaceable Guidelines
* Use callouts for replaceables in code segments to make it clear to the user
  that a replaceable is present.

== Styling links

.Links Quick Reference
[cols="33%,33%a,33%a",options="header"]
|===
|Item |Use |Not
.2+|Zip files .2+|zip
|_.zip_
|ZIP
.2+|Tar files .2+|tar
|_.tar_
|TAR
|External links |\link:github.com[GitHub^] |\link:github.com[GitHub]
|Internal links |\xref:doc_id[Section Title]|\xref:doc_id[Section Title^]
|===

NOTE: If you use the caret syntax more than once in a single paragraph, you may need to
escape the first occurrence with a backslash.

IMPORTANT: Links with attributes (including the subject and body segments on mailto links)
are a feature unique to Asciidoctor. When they are enabled, you must surround the link text
in double quotes if it contains a comma.

.Additional Link Guidelines
* Refer to the top-level sections of books as chapters, not sections
  or topics.
* Do not split link paths across lines when wrapping text. This will cause issues with the doc builds.

== Naming files

.File Names Quick Reference
[cols="33%,33%a,33%a",options="header"]
|===
|Item |Use |Not
.2+|Custom attributes
.2+|\`ThisStyle`
|\`this-style`
|\`this_style`
.2+|File and directory names
.2+|\`this-style`
|\`this_style`
|\`ThisStyle`
|===