zephyr/doc/documentation/writing.rst

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.. _generalWriting:
General Writing Style Guidelines
################################
These guidelines apply to every type of document, in-code comment,
commit message or note. For details on any of these items, see the
cross-reference. Many of this writing guidelines stem from the concepts
of simplified English.
* Limit line length to 80 characters. This is due to the limitations
of the review system.
* Remove trailing white space from your documents.
* Short sentences and paragraphs. Keep sentence length down to about
20 words.
* Include only one main idea in a sentence.
* Limit the number of clauses you use to no more than two.
* Limit the number of sentences per paragraph to about six.
* Use strong verbs.
* Use action verbs.
* Avoid weak verbs like be, have, make, and do.
* Use short direct commands and avoid niceties such as the word
"please".
* Use the present tense wherever possible and avoid past and future
tense verbs.
* Use Active voice. Write, "Someone does something"; don't write,
"Something is done by someone" or "Something is done."
* Use "we" for recommendations. Write "We recommend..." as opposed to
"It is recommended...."
* Use "you" rather than "the user" in your instructions.
* Use short common English words whenever possible.
* Limit noun phrases to three terms.
* Use parallelism in headings, sentences, and lists.
* Put conditional phrases first in cautions and warnings. For example:
"If you do X, then Y will occur."
* Limit headings to three levels. Avoid heading levels beyond H3. If
you have fourth, fifth, or sixth level headings, rewrite the
information in these sections as tables or create a new section for
them.
* To reduce ambiguity, use articles such as 'a', 'an', and 'the'
whenever possible.
* Do abbreviate codenames by using a substitution. For example:
\|codename\| is defined in the
:file:`forto-collab/doc/substitutions.rst` to be replaced by "Zephyr
Operating System".
* Place figures and tables immediately after related text.
* Place code immediately after the words "for example:" in a new line.
* Use the appropriate cross-reference format to refer to figures, code
and tables specifically: Use "Figure X," instead of "The figure above
or below" whenever possible.
* Avoid inserting any table or figure without having at least one
direct cross-reference to it in the body text.
Step-by-step Procedures
***********************
* Provide a sequence of numbered steps, starting with 1. Do not
provide a paragraph of sentences.
* Describe one action per step.
* If the user needs to do the same thing for several procedures, refer
to earlier steps rather than repeating them.
* When steps and diagrams flow down a page side-by-side, put text on
the left and diagrams on the right.
* When steps include commands or code blocks, put the commands or code
blocks after the step that includes them.
* If directions can appear in only one place, either text or figure,
put them in the text; don't hide directions in diagrams.
* When a series of steps is supported by one figure, refer to the
figure in the introductory text: "See Figure 15 and do the following:"
* When a series of steps is supported by two or more figures, avoid
referring to a range of figures. Rather, refer to a specific figure
in the relevant step and show the figure immediately after the
reference. Do not say: "See figures 15 through 22 and do the
following:"
You can find more details of the concepts listed here in the
:ref:`detailed`.