125 lines
5.2 KiB
Markdown
125 lines
5.2 KiB
Markdown
---
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title: "Standards"
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---
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To ensure that the documentation for Home Assistant is consistent and easy to follow for both novice and expert users, we ask that you follow a very strict set of standards for developing the documentation.
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## General Documentation
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* The language of the documentation should be American-English.
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* Don't put two spaces after a period and avoid the "Oxford comma".
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* There is no limit for the line length. You are allowed to write in a flowing text style. This will make it easier to use the GitHub online editor in the future.
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* Be objective and not gender favoring, polarizing, race related or religion inconsiderate.
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* The case of brand names, services, protocols, components and platforms must match its respective counterpart. e.g., "Z-Wave" **not** "Zwave", "Z-wave", "Z Wave" or "ZWave". Also, "Input Select" **not** "input select" or "Input select".
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* All headings should use the `{% linkable_title %}` tag.
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* Do not use ALL CAPITALS for emphasis - use italics instead.
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## Component and Platform Pages
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* The **Configuration Variables** section must use the `{% configuration %}` tag.
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* Configuration variables must document the requirement status (`false` or `true`).
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* Configuration variables must document the default value, if any.
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* Configuration variables must document the accepted value types (see [Configuration variables details](documentation_create_page.md#configuration)).
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* For configuration variables that accept multiple types, separate the types with a comma (i.e. `string, int`).
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* Use YAML sequence syntax in the sample code if it is supported.
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* All examples should be formatted to be included in `configuration.yaml` unless explicitly stated.
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* Use capital letters and `_` to indicate that the value needs to be replaced. E.g., `api_key: YOUR_API_KEY` or `api_key: REPLACE_ME`.
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* If you know that the API key or value contains [control characters](https://en.wikipedia.org/wiki/YAML#Syntax), e.g., `#`, `[`, `?`, etc., wrap it in quotes and add a note.
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* Component and platform names should be a link to their respective documentation pages.
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Example configuration block
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```yaml
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{% configuration %}
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some_key:
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description: This is a description of what this key is for.
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required: false
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type: string
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default: Optional default value - leave out if there isn't one
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{% endconfiguration %}
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```
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## Templates
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* All examples containing Jinja2 templates should be wrapped **outside** of the code markdown with the `{% raw %}` tag.
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* Do not use `states.switch.source.state` in templates. Instead use `states()` and `is_state()`.
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* Use double quotes (`"`) for ([more information](#single-vs-double-quotation-marks)):
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* `friendly_name`
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* Single-line templates:
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* `value_template`
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* `level_template`
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* `icon_template`
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* Children of `data_template`
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* Use single quotes (`'`) for ([more information](#single-vs-double-quotation-marks):
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* Strings inside of templates:
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* States
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* Entity IDs
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* `unit_of_measurement`
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* No whitespace around pipe character (`|`) for Jinja2 filters.
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* Single whitespace after Jinja2 opening delimiters ({% raw %}`{{`{% endraw %}).
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* Single whitespace before Jinja2 closing delimiters ({% raw %}`}}`{% endraw %}).
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* Do not quote values for:
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* `device_class`
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* `platform`
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* `condition`
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* `service`
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## Renaming Pages
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It can happen that a component or platform is renamed, in this case the documentation needs to be updated as well. If you rename a page, add `redirect_from:` to the file header and let it point to the old location/name of the page. Please consider to add details, like release number or old component/platform name, to the page in a [note](/developers/documentation/create_page/#html).
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```text
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---
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...
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redirect_from: /getting-started/android/
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---
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```
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Adding a redirect also applies if you move content around in the [documentation](/docs/).
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## Single vs. Double Quotation Marks
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Use single quotes (`'`) for strings inside of a template. It is more obvious to escape a single quote when necessary (i.e. `name` is a possessive noun), because the single quotes that wrap the string are closer in position to the apostrophe inside the string. Use double quotes (`"`) outside of a template (unless it is a multi-line template, in which case outside quotes are not required).
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### Examples
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#### Double Quotes Outside, Single Quotes Inside (Valid)
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```yaml
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automation:
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...
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action:
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- service: notify.notify
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data_template:
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message: "{% if trigger.to_state.name == 'Dale\'s Bedroom' %}Someone's in your base, killing your noobs!{% else %}It's just another door.{% endif %}"
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```
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#### Single Quotes Outside, Double Quotes Inside (Invalid)
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```yaml
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automation:
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...
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action:
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- service: notify.notify
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data_template:
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message: '{% if trigger.to_state.name == "Dale's Bedroom" %}Someone's in your base, killing your noobs!{% else %}It's just another door.{% endif %}'
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```
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#### Multi-Line Template (Valid)
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```yaml
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automation:
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...
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action:
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- service: notify.notify
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data_template:
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message: >-
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{% if trigger.to_state.name == 'Dale\'s Bedroom' %}
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Someone's in your base, killing your noobs!
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{% else %}
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It's just another door.
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{% endif %}
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```
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