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href="/en/contributing/setting-up-your-environment-to-work-on-github-docs/troubleshooting-your-environment"><div data-component="ActionList.Item--DividerContainer" class="Box-sc-g0xbh4-0 hROlum"><span id=":Repb6n6:--label" class="Box-sc-g0xbh4-0 bmseMA">Troubleshooting your environment</span></div></a></li></ul></div></li></ul></nav></div></div></div></nav></div><div class="flex-column flex-1 min-width-0"><main id="main-content" style="scroll-margin-top:5rem"><div class="container-xl px-3 px-md-6 my-4"><div class="d-none d-xxl-block mt-3 mr-auto width-full"><nav data-testid="breadcrumbs-in-article" class="f5 breadcrumbs Breadcrumbs_breadcrumbs__xAC4i" aria-label="Breadcrumb" data-container="breadcrumbs"><ul><li class="d-inline-block"><a rel="" data-testid="breadcrumb-link" title="Contribute to GitHub Docs" class="Link--primary mr-2 color-fg-muted" href="/en/contributing">Contribute to GitHub Docs</a><span class="color-fg-muted pr-2">/</span></li><li class="d-inline-block"><a rel="" data-testid="breadcrumb-link" title="Writing for GitHub Docs" class="Link--primary mr-2 color-fg-muted" href="/en/contributing/writing-for-github-docs">Writing for GitHub Docs</a><span class="color-fg-muted pr-2">/</span></li><li class="d-inline-block"><a rel="" data-testid="breadcrumb-link" title="Versioning documentation" class="Link--primary mr-2 color-fg-muted d-none" href="/en/contributing/writing-for-github-docs/versioning-documentation">Versioning documentation</a></li></ul></nav></div><div class="ArticleGridLayout_containerBox__lLLio"><div class="Box-sc-g0xbh4-0 eQiQea"><div class="d-flex flex-items-baseline flex-justify-between" data-container="title"><h1 id="title-h1" class="border-bottom-0">Versioning documentation</h1></div></div><div id="article-intro" class="Box-sc-g0xbh4-0 ijSsTo f4 pb-4"><div class="f2 color-fg-muted mb-3 Lead_container__m3L5f _page-intro" data-container="lead" data-testid="lead" data-search="lead"><p>GitHub Docs uses YAML frontmatter and liquid operators to support multiple versions of GitHub with a single-source approach.</p></div></div><div data-container="toc" class="Box-sc-g0xbh4-0 giVcWX ArticleGridLayout_sidebarBox__Cj_03 border-bottom border-lg-0 pb-4 mb-5 pb-xl-0 mb-xl-0"><h2 id="in-this-article" class="Heading__StyledHeading-sc-1c1dgg0-0 bebFBv mb-1 ml-3" aria-label="In this article">In this article</h2><nav data-testid="minitoc" class="NavList__NavBox-sc-1c8ygf7-0 Minitocs_miniToc__NaGol my-2" aria-labelledby="in-this-article"><ul class="List__ListBox-sc-1x7olzq-0 hgjakc"><li class="Item__LiBox-sc-yeql7o-0 lnYQME"><a tabindex="0" aria-labelledby=":R2dkteqn6:--label " id=":R2dkteqn6:" aria-current="false" href="#how-and-where-to-version" class="Link__StyledLink-sc-14289xe-0 cJbOew Minitocs_nested__JSAov"><div data-component="ActionList.Item--DividerContainer" class="Box-sc-g0xbh4-0 hROlum"><span id=":R2dkteqn6:--label" class="Box-sc-g0xbh4-0 bmseMA">How and where to version</span></div></a></li><li class="Item__LiBox-sc-yeql7o-0 lnYQME"><a tabindex="0" aria-labelledby=":R2lkteqn6:--label " id=":R2lkteqn6:" aria-current="false" href="#about-the-different-versions-of-github" class="Link__StyledLink-sc-14289xe-0 cJbOew Minitocs_nested__JSAov"><div data-component="ActionList.Item--DividerContainer" class="Box-sc-g0xbh4-0 hROlum"><span id=":R2lkteqn6:--label" class="Box-sc-g0xbh4-0 bmseMA">About the different versions of GitHub</span></div></a></li><li class="Item__LiBox-sc-yeql7o-0 lnYQME"><a tabindex="0" aria-labelledby=":R2tkteqn6:--label " id=":R2tkteqn6:" aria-current="false" href="#versioning-in-the-yaml-frontmatter" class="Link__StyledLink-sc-14289xe-0 cJbOew Minitocs_nested__JSAov"><div data-component="ActionList.Item--DividerContainer" class="Box-sc-g0xbh4-0 hROlum"><span id=":R2tkteqn6:--label" class="Box-sc-g0xbh4-0 bmseMA">Versioning in the YAML frontmatter</span></div></a></li><li class="Item__LiBox-sc-yeql7o-0 lnYQME"><a tabindex="0" aria-labelledby=":R35kteqn6:--label " id=":R35kteqn6:" aria-current="false" href="#versioning-with-liquid-conditional-operators" class="Link__StyledLink-sc-14289xe-0 cJbOew Minitocs_nested__JSAov"><div data-component="ActionList.Item--DividerContainer" class="Box-sc-g0xbh4-0 hROlum"><span id=":R35kteqn6:--label" class="Box-sc-g0xbh4-0 bmseMA">Versioning with Liquid conditional operators</span></div></a></li><li class="Item__LiBox-sc-yeql7o-0 lnYQME"><a tabindex="0" aria-labelledby=":R3dkteqn6:--label " id=":R3dkteqn6:" aria-current="false" href="#about-feature-based-versioning" class="Link__StyledLink-sc-14289xe-0 cJbOew Minitocs_nested__JSAov"><div data-component="ActionList.Item--DividerContainer" class="Box-sc-g0xbh4-0 hROlum"><span id=":R3dkteqn6:--label" class="Box-sc-g0xbh4-0 bmseMA">About feature-based versioning</span></div></a></li><li class="Item__LiBox-sc-yeql7o-0 lnYQME"><a tabindex="0" aria-labelledby=":R3lkteqn6:--label " id=":R3lkteqn6:" aria-current="false" href="#best-practices" class="Link__StyledLink-sc-14289xe-0 cJbOew Minitocs_nested__JSAov"><div data-component="ActionList.Item--DividerContainer" class="Box-sc-g0xbh4-0 hROlum"><span id=":R3lkteqn6:--label" class="Box-sc-g0xbh4-0 bmseMA">Best practices</span></div></a></li></ul></nav></div><div data-container="article" data-search="article-body" class="Box-sc-g0xbh4-0 kohLxz"><div id="article-contents"><div class="MarkdownContent_markdownBody__v5MYy markdown-body"><p>On GitHub Docs, we provide versions of our documentation that reflect the differences in UI and functionality across GitHub's major product offerings. Contributors can use versioning syntax to scope content to a specific product offering.</p> <p>Versioning syntax allows the reader to manually choose the version of the documentation that applies to the product they're using. GitHub Docs' URLs can also include versioning information, which allows links from one version of GitHub Docs to another to send the reader directly to documentation for the product they're using.</p> <h2 id="how-and-where-to-version" tabindex="-1"><a class="heading-link" href="#how-and-where-to-version">How and where to version<span class="heading-link-symbol" aria-hidden="true"></span></a></h2> <p>Versioning for content on GitHub Docs is single-source to avoid repetition and keep prose <a href="https://en.wikipedia.org/wiki/Don%27t_repeat_yourself">DRY</a>. For articles, you apply versioning to an individual Markdown file with YAML metadata, then use conditional statements within the file's prose to instruct the site which text to display depending on the version the reader selects. Single-sourcing contrasts to the creation of separate files that reflect each version of the content.</p> <p>There are two types of versioning syntax for GitHub Docs.</p> <ul> <li> <p>YAML: Used most often in YAML front matter within Markdown files in <code>content/</code>, but also in many types of YAML files in <code>data/</code>. Indicates the versioning for an entire piece of content.</p> <pre><code class="hljs language-yaml"><span class="hljs-attr">versions:</span> <span class="hljs-attr">PRODUCT:</span> <span class="hljs-string">'VERSIONS'</span> <span class="hljs-attr">PRODUCT:</span> <span class="hljs-string">'VERSIONS'</span> <span class="hljs-string">...</span> </code></pre> <p>The following example shows content versioned for Free, Pro, & Team, and all versions of GitHub Enterprise Server.</p> <pre><code class="hljs language-yaml"><span class="hljs-attr">versions:</span> <span class="hljs-attr">fpt:</span> <span class="hljs-string">*</span> <span class="hljs-attr">ghes:</span> <span class="hljs-string">*</span> </code></pre> </li> <li> <p>Liquid: Used within Markdown files in <code>content/</code> and <code>data/reusables/</code>, variable strings within YAML files in <code>data/variables/</code>, or strings within <code>data/glossaries/external.yml</code>. Indicates which text should appear when a reader chooses a version for content that has multiple versions defined by YAML front matter.</p> <ul> <li> <p>Product-based versioning:</p> <pre><code class="hljs language-javascript">{% ifversion <span class="hljs-variable constant_">SHORT</span>-<span class="hljs-variable constant_">PRODUCT</span>-<span class="hljs-variable constant_">NAME</span> %} ... {% endif %} </code></pre> </li> <li> <p>Feature-based versioning:</p> <pre><code class="hljs language-javascript">{% ifversion <span class="hljs-variable constant_">FEATURE</span>-<span class="hljs-variable constant_">NAME</span> %} ... {% endif %} </code></pre> </li> </ul> </li> </ul> <h2 id="about-the-different-versions-of-github" tabindex="-1"><a class="heading-link" href="#about-the-different-versions-of-github">About the different versions of GitHub<span class="heading-link-symbol" aria-hidden="true"></span></a></h2> <p>We provide versioned documentation for users of GitHub plans including GitHub Enterprise Cloud and GitHub Enterprise Server. If multiple versions of a page exist on the site, readers can choose the version from the version picker at the top of the page.</p> <h3 id="githubcom" tabindex="-1"><a class="heading-link" href="#githubcom">GitHub.com<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>Documentation for GitHub.com has two possible versions:</p> <h4 id="free-pro-or-team-plans" tabindex="-1"><a class="heading-link" href="#free-pro-or-team-plans">Free, Pro, or Team plans<span class="heading-link-symbol" aria-hidden="true"></span></a></h4> <p>For Free, Pro, or Team plans on GitHub.com, use <code>free-pro-team@latest</code>. The short name is <code>fpt</code>.</p> <h4 id="github-enterprise-cloud" tabindex="-1"><a class="heading-link" href="#github-enterprise-cloud">GitHub Enterprise Cloud<span class="heading-link-symbol" aria-hidden="true"></span></a></h4> <p>For GitHub Enterprise Cloud, use <code>enterprise-cloud@latest</code>. The short name is <code>ghec</code>.</p> <h3 id="github-enterprise-server" tabindex="-1"><a class="heading-link" href="#github-enterprise-server">GitHub Enterprise Server<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>Documentation for GitHub Enterprise Server has multiple versions and can be divided into two types: documentation for <em>supported releases</em> (we support four at any one time), and documentation for <em>closing down releases</em> (we do not link to these on the Docs site but we support a "frozen" snapshot of these docs in perpetuity, so they can still be accessed if you know the URLs). See <a href="https://github.com/github/docs/blob/main/src/versions/lib/enterprise-server-releases.js"><code>lib/enterprise-server-releases.js</code></a> for a list.</p> <p>The versions are named <code>enterprise-server@<release></code>. The short name is <code>ghes</code>. In Liquid conditionals, we can specify ranges, like <code>ghes > 3.0</code>. For more information, see "<a href="#versioning-with-liquid-conditional-operators">Versioning with Liquid conditional operators</a>."</p> <h2 id="versioning-in-the-yaml-frontmatter" tabindex="-1"><a class="heading-link" href="#versioning-in-the-yaml-frontmatter">Versioning in the YAML frontmatter<span class="heading-link-symbol" aria-hidden="true"></span></a></h2> <p>You can use the <code>versions</code> property within a file's frontmatter to define which products an article will appear for. Index files require a <code>versions</code> property, but they will be automatically versioned based on the versions of their children.</p> <p>For example, the following YAML frontmatter will version an article for GitHub Enterprise Server 2.20 and above and Free, Pro, or Team.</p> <pre><code class="hljs language-yaml"><span class="hljs-attr">title:</span> <span class="hljs-string">About</span> <span class="hljs-string">your</span> <span class="hljs-string">personal</span> <span class="hljs-string">dashboard</span> <span class="hljs-attr">versions:</span> <span class="hljs-attr">fpt:</span> <span class="hljs-string">'*'</span> <span class="hljs-attr">ghes:</span> <span class="hljs-string">'>=2.20'</span> </code></pre> <p>The following example will version an article for all supported versions of GitHub Enterprise Server:</p> <pre><code class="hljs language-yaml"><span class="hljs-attr">title:</span> <span class="hljs-string">Downloading</span> <span class="hljs-string">your</span> <span class="hljs-string">license</span> <span class="hljs-attr">versions:</span> <span class="hljs-attr">ghes:</span> <span class="hljs-string">'*'</span> </code></pre> <p>You can also version a page for a range of releases. The following example will version the page for Free, Pro, & Team, GitHub Enterprise Cloud, and GitHub Enterprise Server versions 3.1 and 3.2 only:</p> <pre><code class="hljs language-yaml"><span class="hljs-attr">versions:</span> <span class="hljs-attr">fpt:</span> <span class="hljs-string">'*'</span> <span class="hljs-attr">ghec:</span> <span class="hljs-string">'*'</span> <span class="hljs-attr">ghes:</span> <span class="hljs-string">'>=3.1 <3.3'</span> </code></pre> <h2 id="versioning-with-liquid-conditional-operators" tabindex="-1"><a class="heading-link" href="#versioning-with-liquid-conditional-operators">Versioning with Liquid conditional operators<span class="heading-link-symbol" aria-hidden="true"></span></a></h2> <p>We use the <a href="https://shopify.github.io/liquid/basics/introduction/">Liquid template language</a> (specifically, <a href="https://github.com/harttle/liquidjs">this Node.js port</a>) and a custom <code>{% ifversion ... %}</code> tag to create versions of our documentation.</p> <p>If you define multiple products in the <code>versions</code> key within a page's YAML frontmatter, you can use the conditional operators <code>ifversion</code>/<code>else</code> (or <code>ifversion</code>/<code>elsif</code>/<code>else</code>) in the Markdown to control how the site renders content on the page for a particular product. For example, a feature may have more options on GitHub.com than on GitHub Enterprise Server, so you can version the content appropriately via the <code>versions</code> frontmatter, and use Liquid conditionals to describe the additional options for GitHub.com.</p> <div class="ghd-alert ghd-alert-accent"><p class="ghd-alert-title"><svg version="1.1" width="16" height="16" viewBox="0 0 16 16" class="octicon mr-2" aria-hidden><path d="M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8Zm8-6.5a6.5 6.5 0 1 0 0 13 6.5 6.5 0 0 0 0-13ZM6.5 7.75A.75.75 0 0 1 7.25 7h1a.75.75 0 0 1 .75.75v2.75h.25a.75.75 0 0 1 0 1.5h-2a.75.75 0 0 1 0-1.5h.25v-2h-.25a.75.75 0 0 1-.75-.75ZM8 6a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z"></path></svg>Note</p> <p></p> <ul> <li>Use <code>ifversion</code> for product-based versioning and <a href="#about-feature-based-versioning">feature-based versioning</a>.</li> <li>Do not use <code>if</code> or <code>unless</code>.</li> <li>Make sure to use <code>elsif</code> and not <code>else if</code>. Liquid does not recognize <code>else if</code> and will not render content inside an <code>else if</code> block.</li> </ul> </div> <h3 id="comparison-operators" tabindex="-1"><a class="heading-link" href="#comparison-operators">Comparison operators<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>For versions that don't have numbered releases (like <code>fpt</code> and <code>ghec</code>), you have two options:</p> <ul> <li><code>{% ifversion ghec %}</code></li> <li><code>{% ifversion not ghec %}</code></li> </ul> <p>For versions that have numbered releases (currently only <code>ghes</code>), you can do the same for content that is either available in all of the releases or not available in any of the releases:</p> <ul> <li><code>{% ifversion ghes %}</code></li> <li><code>{% ifversion not ghes %}</code></li> </ul> <p>If you need to denote content that is only available (or not available) in certain releases, you can use the following operators:</p> <table><thead><tr><th scope="col">Operator</th><th scope="col">Meaning</th><th scope="col">Example</th></tr></thead><tbody><tr><td><code>=</code></td><td>Equal to</td><td><code>{% ifversion ghes = 3.0 %}</code></td></tr><tr><td><code>></code></td><td>Newer than</td><td><code>{% ifversion ghes > 3.0 %}</code></td></tr><tr><td><code><</code></td><td>Older than</td><td><code>{% ifversion ghes < 3.0 %}</code></td></tr><tr><td><code>!=</code></td><td>Not equal to</td><td><code>{% ifversion ghes != 3.0 %}</code> (don't use <code>not</code> in ranges)</td></tr></tbody></table> <p>The Liquid operators <code>==</code>, <code>>=</code>, and <code><=</code> are not supported in the GitHub Docs.</p> <h3 id="logical-operators" tabindex="-1"><a class="heading-link" href="#logical-operators">Logical operators<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>When all operands must be true for the condition to be true, use the operator <code>and</code>:</p> <pre><code class="hljs language-text">{% ifversion ghes > 2.21 and ghes < 3.1 %} </code></pre> <p>When at least one operand must be true for the condition to be true, use the operator <code>or</code>:</p> <pre><code class="hljs language-text">{% ifversion fpt or ghes > 2.21 %} </code></pre> <p>Do not use the operators <code>&&</code> or <code>||</code>. Liquid does not recognize them, and the content will not render in the intended versions.</p> <h3 id="whitespace-control" tabindex="-1"><a class="heading-link" href="#whitespace-control">Whitespace control<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>When using Liquid conditionals in lists, you can use <a href="https://shopify.github.io/liquid/basics/whitespace/">whitespace control</a> characters to prevent the addition of newlines and other whitespace that would break the list rendering.</p> <p>You can add a hyphen (<code>-</code>) on either the left, right, or both sides to indicate that there should be no newline or other whitespace on that side.</p> <pre><code class="hljs language-text">{%- ifversion fpt %} </code></pre> <p>For example, to version one step of a procedure, instead of adding liquid versioning for the step starting at the end of the previous step, like this:</p> <pre><code class="hljs language-markdown"><span class="hljs-bullet">1.</span> This step is for all versions{% ifversion ghes %} <span class="hljs-bullet">1.</span> This step is for GHES only{% endif %} <span class="hljs-bullet">1.</span> This step is for all versions </code></pre> <p>You can include the liquid versioning on its own line and use whitespace control to strip the newline to the left of the liquid tag. This makes reading the source much easier, without breaking the rendering of the list:</p> <pre><code class="hljs language-markdown"><span class="hljs-bullet">1.</span> This step is for all versions {%- ifversion ghes %} <span class="hljs-bullet">1.</span> This step is for GHES only {%- endif %} <span class="hljs-bullet">1.</span> This row is for all versions </code></pre> <h2 id="about-feature-based-versioning" tabindex="-1"><a class="heading-link" href="#about-feature-based-versioning">About feature-based versioning<span class="heading-link-symbol" aria-hidden="true"></span></a></h2> <p>When you document any new change or feature, use feature-based versioning.</p> <p>A small minority of features and changes will only ever apply to one product. The majority of features come to GitHub.com and eventually reach all products. In general, changes "flow" from GitHub.com (including GitHub Enterprise Cloud) <a href="/en/enterprise-server@3.15/admin/overview/about-upgrades-to-new-releases" _originalHref="/enterprise-server@latest/admin/overview/about-upgrades-to-new-releases">to GitHub Enterprise Server</a>.</p> <p>Feature-based versioning provides named "feature flags" that simplify the maintenance and versioning of documentation. You can use a single feature name (or "flag") to group and version prose throughout content. When a feature comes to additional products, you only need to make a change to the YAML versioning in the file within <code>data/features/</code>.</p> <h3 id="managing-features" tabindex="-1"><a class="heading-link" href="#managing-features">Managing features<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>Each feature is managed through individual YAML files in <code>data/features/</code>.</p> <div class="ghd-alert ghd-alert-accent"><p class="ghd-alert-title"><svg version="1.1" width="16" height="16" viewBox="0 0 16 16" class="octicon mr-2" aria-hidden><path d="M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8Zm8-6.5a6.5 6.5 0 1 0 0 13 6.5 6.5 0 0 0 0-13ZM6.5 7.75A.75.75 0 0 1 7.25 7h1a.75.75 0 0 1 .75.75v2.75h.25a.75.75 0 0 1 0 1.5h-2a.75.75 0 0 1 0-1.5h.25v-2h-.25a.75.75 0 0 1-.75-.75ZM8 6a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z"></path></svg>Note</p> <p> Do not delete <code>data/features/placeholder.yml</code> because it is used by tests.</p> </div> <p>To create a new feature, first create a new YAML file with the feature name you want to use in this directory. For a feature named <code>meow</code>, that would be <code>data/features/meow.yml</code>.</p> <p>Add a <code>versions</code> block to the YAML file with the short names of the versions the feature is available in. For example:</p> <pre><code class="hljs language-yaml"><span class="hljs-attr">versions:</span> <span class="hljs-attr">fpt:</span> <span class="hljs-string">'*'</span> <span class="hljs-attr">ghec:</span> <span class="hljs-string">'*'</span> <span class="hljs-attr">ghes:</span> <span class="hljs-string">'>3.1'</span> </code></pre> <p>The format and allowed values are the same as the frontmatter versions property. For more information, see "<a href="https://github.com/github/docs/tree/main/content#versions">Versions</a>" in the <code>github/docs</code> repository README.</p> <h3 id="liquid-conditionals" tabindex="-1"><a class="heading-link" href="#liquid-conditionals">Liquid conditionals<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>Now you can use <code>{% ifversion meow %} ... {% endif %}</code> in content files!</p> <h3 id="frontmatter" tabindex="-1"><a class="heading-link" href="#frontmatter">Frontmatter<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>You can also use the feature in frontmatter in content files:</p> <pre><code class="hljs language-yaml"><span class="hljs-attr">versions:</span> <span class="hljs-attr">feature:</span> <span class="hljs-string">'meow'</span> </code></pre> <p>You can only use one <code>feature</code> entry under <code>versions</code>, and the value of <code>feature</code> can only contain one feature name.</p> <p>You can combine feature-based versioning and standard versioning in frontmatter. When you do this the article will be included in the superset of all of the versions specified in the feature-based versioning file and directly in the Markdown file. For example, you might have a feature that is currently only available in GHEC, and this is specified in the feature-based versioning. However, you want the "About" article for this feature to also be visible in the FPT docs. In this case you could add <code>fpt</code> and <code>feature</code> to the <code>versions</code> block in the front matter:</p> <pre><code class="hljs language-yaml"><span class="hljs-attr">versions:</span> <span class="hljs-attr">fpt:</span> <span class="hljs-string">'*'</span> <span class="hljs-attr">feature:</span> <span class="hljs-string">'some-new-feature'</span> </code></pre> <h2 id="best-practices" tabindex="-1"><a class="heading-link" href="#best-practices">Best practices<span class="heading-link-symbol" aria-hidden="true"></span></a></h2> <p>Versioned content impacts the reader, but also impacts anyone who contributes to or reviews the content. Here are a few tips to improve the writing, reading, and reviewing experience for versioning syntax. None of these practices are mandatory and you will find edge and corner cases, but they're intended as useful heuristics to help you think through versioning.</p> <h3 id="avoid-unnecessary-versioning" tabindex="-1"><a class="heading-link" href="#avoid-unnecessary-versioning">Avoid unnecessary versioning<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>For the reader, gaining a general understanding is more important than reading details that precisely reflect the differences between particular products or plans. In conceptual or procedural content, try to describe features or portions of the UI in a general way that doesn't require versioning syntax. In addition to being easier for us to maintain, this strengthens understanding for readers who refer to documentation for multiple products.</p> <ul> <li>Do ask yourself, "can I write this content in a way that applies to all products without any versioning?"</li> <li>Do try to avoid versioning screenshots if you can, given the effort required to create them. Minor differences between UI copy may not affect understanding. If product-specific text or UI elements exist, but the screenshot still provides helpful context, ask yourself whether versioning the screenshots would affect understanding to a meaningful degree.</li> <li>Don't version prose if you can explain a concept or walk the reader through a procedure without versioning for specific products.</li> </ul> <h3 id="when-modifying-an-existing-content-file-review-existing-versioning-early-and-often" tabindex="-1"><a class="heading-link" href="#when-modifying-an-existing-content-file-review-existing-versioning-early-and-often">When modifying an existing content file, review existing versioning early and often<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>Staying cognizant of existing versioning will help ensure that you write relevant versioning statements, and can help remind you to version new content accurately.</p> <ul> <li>Do review the entire page's versioning in the front matter as soon as you begin editing.</li> <li>Do review the versioning around content that you're editing.</li> <li>Do review the rendered version of changes that you're making, and switch to each available version for the page as part of your self-review.</li> </ul> <h3 id="avoid-repetition-as-much-as-possible" tabindex="-1"><a class="heading-link" href="#avoid-repetition-as-much-as-possible">Avoid repetition as much as possible<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>Use versioning syntax within a sentence or paragraph to differentiate prose for two different plans or products. A contributor can edit just one paragraph with versioning statements, instead of needing to consider larger blocks of versioned text and modify similar but differently versioned prose in two places. A reviewer can suggest a change once, instead of needing to leave the same suggestion in multiple places. But if the behavior differs dramatically or versioning within the sentence or paragraph becomes complicated or difficult for a contributor to parse, consider repeating yourself to make the prose easier to maintain.</p> <ul> <li> <p>Do use versioning syntax inline within paragraphs to avoid repeating sentences or entire paragraphs.</p> <blockquote> <p>You can do {% ifversion fpt %}something{% elsif ghec %}something else{% endif %}.</p> </blockquote> </li> <li> <p>Do use your judgment: for prose that would be complicated to write or read without lots of versioning syntax within a sentence or paragraph, consider repeating the entire paragraph in a version block for each relevant product.</p> <blockquote> <p>{% ifversion fpt %}</p> <p>If you use a Free, Pro, or Team plan, you can do something. Here's more information about the things you can do with a Free, Pro, or Team plan...</p> <p>{% elsif ghec %}</p> <p>If you use GitHub Enterprise Cloud, you can do something else. Here's more information about the things you can do with GitHub Enterprise Cloud...</p> <p>{% endif %}</p> </blockquote> </li> </ul> <h3 id="be-explicit-not-implicit" tabindex="-1"><a class="heading-link" href="#be-explicit-not-implicit">Be explicit, not implicit<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>If you know exactly which products the content describes, version explicitly for those products. Syntax like <code>not</code>, and <code>else</code> in particular, can be imprecise. The end result of <code>not</code> and <code>else</code> depend on each article's front matter, so a contributor must do more investigation to understand prose with this versioning. This creates the potential for errors. The complexity of implicit versioning increases in reusables, where articles that reference the reusable may have different versioning, and thus different evaluations of <code>not</code> or <code>else</code>. We also occasionally introduce a new version to GitHub Docs when GitHub introduces a new product, which changes the end result of <code>not</code> and <code>else</code> when we add the new version to existing articles.</p> <ul> <li>Do remember that GitHub offers four products, and remember that GitHub Docs can display documentation for eight total versions at any given time.</li> <li>Do review an entire article's versioning in the front matter when you begin editing, as this can help you understand how <code>not</code> and <code>else</code> will behave in Liquid statements, or change when you enable new versions in the front matter.</li> </ul> <h3 id="verify-and-communicate-versioning-as-you-work-through-content-design-and-creation" tabindex="-1"><a class="heading-link" href="#verify-and-communicate-versioning-as-you-work-through-content-design-and-creation">Verify and communicate versioning as you work through content design and creation<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>Sometimes a change isn't included in the release it was originally intended for. You can save time for reviewers and ensure more accurate content by confirming versioning throughout content design and creation, for both releases and improvements.</p> <ul> <li>Do consider versioning in content design, and do double-check the versioning when you request stakeholder reviews for content creation.</li> <li>Do make the review easier for other writers and stakeholders: point out differences between versions in your request for review, linking to specific rendered versions of the content if necessary.</li> <li>Do trust, but verify.</li> </ul> <h3 id="test-test-and-test-again" tabindex="-1"><a class="heading-link" href="#test-test-and-test-again">Test, test, and test again<span class="heading-link-symbol" aria-hidden="true"></span></a></h3> <p>Whether you're writing the content or reviewing the content, pay attention to the content design plan and affected products, and check the rendered content in a staging or development environment to ensure that the content describes 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differences in UI and functionality across GitHub's major product offerings. Contributors can use versioning syntax to scope content to a specific product offering.\u003c/p\u003e\n\u003cp\u003eVersioning syntax allows the reader to manually choose the version of the documentation that applies to the product they're using. GitHub Docs' URLs can also include versioning information, which allows links from one version of GitHub Docs to another to send the reader directly to documentation for the product they're using.\u003c/p\u003e\n\u003ch2 id=\"how-and-where-to-version\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#how-and-where-to-version\"\u003eHow and where to version\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h2\u003e\n\u003cp\u003eVersioning for content on GitHub Docs is single-source to avoid repetition and keep prose \u003ca href=\"https://en.wikipedia.org/wiki/Don%27t_repeat_yourself\"\u003eDRY\u003c/a\u003e. For articles, you apply versioning to an individual Markdown file with YAML metadata, then use conditional statements within the file's prose to instruct the site which text to display depending on the version the reader selects. Single-sourcing contrasts to the creation of separate files that reflect each version of the content.\u003c/p\u003e\n\u003cp\u003eThere are two types of versioning syntax for GitHub Docs.\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eYAML: Used most often in YAML front matter within Markdown files in \u003ccode\u003econtent/\u003c/code\u003e, but also in many types of YAML files in \u003ccode\u003edata/\u003c/code\u003e. Indicates the versioning for an entire piece of content.\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-yaml\"\u003e\u003cspan class=\"hljs-attr\"\u003eversions:\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003ePRODUCT:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'VERSIONS'\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003ePRODUCT:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'VERSIONS'\u003c/span\u003e\n \u003cspan class=\"hljs-string\"\u003e...\u003c/span\u003e\n\u003c/code\u003e\u003c/pre\u003e\n\u003cp\u003eThe following example shows content versioned for Free, Pro, \u0026#x26; Team, and all versions of GitHub Enterprise Server.\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-yaml\"\u003e\u003cspan class=\"hljs-attr\"\u003eversions:\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003efpt:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e*\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003eghes:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e*\u003c/span\u003e\n\u003c/code\u003e\u003c/pre\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp\u003eLiquid: Used within Markdown files in \u003ccode\u003econtent/\u003c/code\u003e and \u003ccode\u003edata/reusables/\u003c/code\u003e, variable strings within YAML files in \u003ccode\u003edata/variables/\u003c/code\u003e, or strings within \u003ccode\u003edata/glossaries/external.yml\u003c/code\u003e. Indicates which text should appear when a reader chooses a version for content that has multiple versions defined by YAML front matter.\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eProduct-based versioning:\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-javascript\"\u003e{% ifversion \u003cspan class=\"hljs-variable constant_\"\u003eSHORT\u003c/span\u003e-\u003cspan class=\"hljs-variable constant_\"\u003ePRODUCT\u003c/span\u003e-\u003cspan class=\"hljs-variable constant_\"\u003eNAME\u003c/span\u003e %} ... {% endif %}\n\u003c/code\u003e\u003c/pre\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp\u003eFeature-based versioning:\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-javascript\"\u003e{% ifversion \u003cspan class=\"hljs-variable constant_\"\u003eFEATURE\u003c/span\u003e-\u003cspan class=\"hljs-variable constant_\"\u003eNAME\u003c/span\u003e %} ... {% endif %}\n\u003c/code\u003e\u003c/pre\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003ch2 id=\"about-the-different-versions-of-github\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#about-the-different-versions-of-github\"\u003eAbout the different versions of GitHub\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h2\u003e\n\u003cp\u003eWe provide versioned documentation for users of GitHub plans including GitHub Enterprise Cloud and GitHub Enterprise Server. If multiple versions of a page exist on the site, readers can choose the version from the version picker at the top of the page.\u003c/p\u003e\n\u003ch3 id=\"githubcom\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#githubcom\"\u003eGitHub.com\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eDocumentation for GitHub.com has two possible versions:\u003c/p\u003e\n\u003ch4 id=\"free-pro-or-team-plans\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#free-pro-or-team-plans\"\u003eFree, Pro, or Team plans\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h4\u003e\n\u003cp\u003eFor Free, Pro, or Team plans on GitHub.com, use \u003ccode\u003efree-pro-team@latest\u003c/code\u003e. The short name is \u003ccode\u003efpt\u003c/code\u003e.\u003c/p\u003e\n\u003ch4 id=\"github-enterprise-cloud\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#github-enterprise-cloud\"\u003eGitHub Enterprise Cloud\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h4\u003e\n\u003cp\u003eFor GitHub Enterprise Cloud, use \u003ccode\u003eenterprise-cloud@latest\u003c/code\u003e. The short name is \u003ccode\u003eghec\u003c/code\u003e.\u003c/p\u003e\n\u003ch3 id=\"github-enterprise-server\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#github-enterprise-server\"\u003eGitHub Enterprise Server\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eDocumentation for GitHub Enterprise Server has multiple versions and can be divided into two types: documentation for \u003cem\u003esupported releases\u003c/em\u003e (we support four at any one time), and documentation for \u003cem\u003eclosing down releases\u003c/em\u003e (we do not link to these on the Docs site but we support a \"frozen\" snapshot of these docs in perpetuity, so they can still be accessed if you know the URLs). See \u003ca href=\"https://github.com/github/docs/blob/main/src/versions/lib/enterprise-server-releases.js\"\u003e\u003ccode\u003elib/enterprise-server-releases.js\u003c/code\u003e\u003c/a\u003e for a list.\u003c/p\u003e\n\u003cp\u003eThe versions are named \u003ccode\u003eenterprise-server@\u0026#x3C;release\u003e\u003c/code\u003e. The short name is \u003ccode\u003eghes\u003c/code\u003e. In Liquid conditionals, we can specify ranges, like \u003ccode\u003eghes \u003e 3.0\u003c/code\u003e. For more information, see \"\u003ca href=\"#versioning-with-liquid-conditional-operators\"\u003eVersioning with Liquid conditional operators\u003c/a\u003e.\"\u003c/p\u003e\n\u003ch2 id=\"versioning-in-the-yaml-frontmatter\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#versioning-in-the-yaml-frontmatter\"\u003eVersioning in the YAML frontmatter\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h2\u003e\n\u003cp\u003eYou can use the \u003ccode\u003eversions\u003c/code\u003e property within a file's frontmatter to define which products an article will appear for. Index files require a \u003ccode\u003eversions\u003c/code\u003e property, but they will be automatically versioned based on the versions of their children.\u003c/p\u003e\n\u003cp\u003eFor example, the following YAML frontmatter will version an article for GitHub Enterprise Server 2.20 and above and Free, Pro, or Team.\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-yaml\"\u003e\u003cspan class=\"hljs-attr\"\u003etitle:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003eAbout\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003eyour\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003epersonal\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003edashboard\u003c/span\u003e\n\u003cspan class=\"hljs-attr\"\u003eversions:\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003efpt:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'*'\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003eghes:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'\u003e=2.20'\u003c/span\u003e\n\u003c/code\u003e\u003c/pre\u003e\n\u003cp\u003eThe following example will version an article for all supported versions of GitHub Enterprise Server:\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-yaml\"\u003e\u003cspan class=\"hljs-attr\"\u003etitle:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003eDownloading\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003eyour\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003elicense\u003c/span\u003e\n\u003cspan class=\"hljs-attr\"\u003eversions:\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003eghes:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'*'\u003c/span\u003e\n\u003c/code\u003e\u003c/pre\u003e\n\u003cp\u003eYou can also version a page for a range of releases. The following example will version the page for Free, Pro, \u0026#x26; Team, GitHub Enterprise Cloud, and GitHub Enterprise Server versions 3.1 and 3.2 only:\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-yaml\"\u003e\u003cspan class=\"hljs-attr\"\u003eversions:\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003efpt:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'*'\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003eghec:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'*'\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003eghes:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'\u003e=3.1 \u0026#x3C;3.3'\u003c/span\u003e\n\u003c/code\u003e\u003c/pre\u003e\n\u003ch2 id=\"versioning-with-liquid-conditional-operators\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#versioning-with-liquid-conditional-operators\"\u003eVersioning with Liquid conditional operators\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h2\u003e\n\u003cp\u003eWe use the \u003ca href=\"https://shopify.github.io/liquid/basics/introduction/\"\u003eLiquid template language\u003c/a\u003e (specifically, \u003ca href=\"https://github.com/harttle/liquidjs\"\u003ethis Node.js port\u003c/a\u003e) and a custom \u003ccode\u003e{% ifversion ... %}\u003c/code\u003e tag to create versions of our documentation.\u003c/p\u003e\n\u003cp\u003eIf you define multiple products in the \u003ccode\u003eversions\u003c/code\u003e key within a page's YAML frontmatter, you can use the conditional operators \u003ccode\u003eifversion\u003c/code\u003e/\u003ccode\u003eelse\u003c/code\u003e (or \u003ccode\u003eifversion\u003c/code\u003e/\u003ccode\u003eelsif\u003c/code\u003e/\u003ccode\u003eelse\u003c/code\u003e) in the Markdown to control how the site renders content on the page for a particular product. For example, a feature may have more options on GitHub.com than on GitHub Enterprise Server, so you can version the content appropriately via the \u003ccode\u003eversions\u003c/code\u003e frontmatter, and use Liquid conditionals to describe the additional options for GitHub.com.\u003c/p\u003e\n\u003cdiv class=\"ghd-alert ghd-alert-accent\"\u003e\u003cp class=\"ghd-alert-title\"\u003e\u003csvg version=\"1.1\" width=\"16\" height=\"16\" viewBox=\"0 0 16 16\" class=\"octicon mr-2\" aria-hidden\u003e\u003cpath d=\"M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8Zm8-6.5a6.5 6.5 0 1 0 0 13 6.5 6.5 0 0 0 0-13ZM6.5 7.75A.75.75 0 0 1 7.25 7h1a.75.75 0 0 1 .75.75v2.75h.25a.75.75 0 0 1 0 1.5h-2a.75.75 0 0 1 0-1.5h.25v-2h-.25a.75.75 0 0 1-.75-.75ZM8 6a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z\"\u003e\u003c/path\u003e\u003c/svg\u003eNote\u003c/p\u003e\n\u003cp\u003e\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003eUse \u003ccode\u003eifversion\u003c/code\u003e for product-based versioning and \u003ca href=\"#about-feature-based-versioning\"\u003efeature-based versioning\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003eDo not use \u003ccode\u003eif\u003c/code\u003e or \u003ccode\u003eunless\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eMake sure to use \u003ccode\u003eelsif\u003c/code\u003e and not \u003ccode\u003eelse if\u003c/code\u003e. Liquid does not recognize \u003ccode\u003eelse if\u003c/code\u003e and will not render content inside an \u003ccode\u003eelse if\u003c/code\u003e block.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/div\u003e\n\u003ch3 id=\"comparison-operators\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#comparison-operators\"\u003eComparison operators\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eFor versions that don't have numbered releases (like \u003ccode\u003efpt\u003c/code\u003e and \u003ccode\u003eghec\u003c/code\u003e), you have two options:\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ccode\u003e{% ifversion ghec %}\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003e{% ifversion not ghec %}\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003eFor versions that have numbered releases (currently only \u003ccode\u003eghes\u003c/code\u003e), you can do the same for content that is either available in all of the releases or not available in any of the releases:\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ccode\u003e{% ifversion ghes %}\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003e{% ifversion not ghes %}\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003eIf you need to denote content that is only available (or not available) in certain releases, you can use the following operators:\u003c/p\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003ctable\u003e\u003cthead\u003e\u003ctr\u003e\u003cth scope=\"col\"\u003eOperator\u003c/th\u003e\u003cth scope=\"col\"\u003eMeaning\u003c/th\u003e\u003cth scope=\"col\"\u003eExample\u003c/th\u003e\u003c/tr\u003e\u003c/thead\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e=\u003c/code\u003e\u003c/td\u003e\u003ctd\u003eEqual to\u003c/td\u003e\u003ctd\u003e\u003ccode\u003e{% ifversion ghes = 3.0 %}\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e\u003e\u003c/code\u003e\u003c/td\u003e\u003ctd\u003eNewer than\u003c/td\u003e\u003ctd\u003e\u003ccode\u003e{% ifversion ghes \u003e 3.0 %}\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e\u0026#x3C;\u003c/code\u003e\u003c/td\u003e\u003ctd\u003eOlder than\u003c/td\u003e\u003ctd\u003e\u003ccode\u003e{% ifversion ghes \u0026#x3C; 3.0 %}\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e!=\u003c/code\u003e\u003c/td\u003e\u003ctd\u003eNot equal to\u003c/td\u003e\u003ctd\u003e\u003ccode\u003e{% ifversion ghes != 3.0 %}\u003c/code\u003e (don't use \u003ccode\u003enot\u003c/code\u003e in ranges)\u003c/td\u003e\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e\n\u003cp\u003eThe Liquid operators \u003ccode\u003e==\u003c/code\u003e, \u003ccode\u003e\u003e=\u003c/code\u003e, and \u003ccode\u003e\u0026#x3C;=\u003c/code\u003e are not supported in the GitHub Docs.\u003c/p\u003e\n\u003ch3 id=\"logical-operators\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#logical-operators\"\u003eLogical operators\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eWhen all operands must be true for the condition to be true, use the operator \u003ccode\u003eand\u003c/code\u003e:\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-text\"\u003e{% ifversion ghes \u003e 2.21 and ghes \u0026#x3C; 3.1 %}\n\u003c/code\u003e\u003c/pre\u003e\n\u003cp\u003eWhen at least one operand must be true for the condition to be true, use the operator \u003ccode\u003eor\u003c/code\u003e:\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-text\"\u003e{% ifversion fpt or ghes \u003e 2.21 %}\n\u003c/code\u003e\u003c/pre\u003e\n\u003cp\u003eDo not use the operators \u003ccode\u003e\u0026#x26;\u0026#x26;\u003c/code\u003e or \u003ccode\u003e||\u003c/code\u003e. Liquid does not recognize them, and the content will not render in the intended versions.\u003c/p\u003e\n\u003ch3 id=\"whitespace-control\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#whitespace-control\"\u003eWhitespace control\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eWhen using Liquid conditionals in lists, you can use \u003ca href=\"https://shopify.github.io/liquid/basics/whitespace/\"\u003ewhitespace control\u003c/a\u003e characters to prevent the addition of newlines and other whitespace that would break the list rendering.\u003c/p\u003e\n\u003cp\u003eYou can add a hyphen (\u003ccode\u003e-\u003c/code\u003e) on either the left, right, or both sides to indicate that there should be no newline or other whitespace on that side.\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-text\"\u003e{%- ifversion fpt %}\n\u003c/code\u003e\u003c/pre\u003e\n\u003cp\u003eFor example, to version one step of a procedure, instead of adding liquid versioning for the step starting at the end of the previous step, like this:\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-markdown\"\u003e\u003cspan class=\"hljs-bullet\"\u003e1.\u003c/span\u003e This step is for all versions{% ifversion ghes %}\n\u003cspan class=\"hljs-bullet\"\u003e1.\u003c/span\u003e This step is for GHES only{% endif %}\n\u003cspan class=\"hljs-bullet\"\u003e1.\u003c/span\u003e This step is for all versions\n\u003c/code\u003e\u003c/pre\u003e\n\u003cp\u003eYou can include the liquid versioning on its own line and use whitespace control to strip the newline to the left of the liquid tag. This makes reading the source much easier, without breaking the rendering of the list:\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-markdown\"\u003e\u003cspan class=\"hljs-bullet\"\u003e1.\u003c/span\u003e This step is for all versions\n{%- ifversion ghes %}\n\u003cspan class=\"hljs-bullet\"\u003e1.\u003c/span\u003e This step is for GHES only\n{%- endif %}\n\u003cspan class=\"hljs-bullet\"\u003e1.\u003c/span\u003e This row is for all versions\n\u003c/code\u003e\u003c/pre\u003e\n\u003ch2 id=\"about-feature-based-versioning\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#about-feature-based-versioning\"\u003eAbout feature-based versioning\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h2\u003e\n\u003cp\u003eWhen you document any new change or feature, use feature-based versioning.\u003c/p\u003e\n\u003cp\u003eA small minority of features and changes will only ever apply to one product. The majority of features come to GitHub.com and eventually reach all products. In general, changes \"flow\" from GitHub.com (including GitHub Enterprise Cloud) \u003ca href=\"/en/enterprise-server@3.15/admin/overview/about-upgrades-to-new-releases\" _originalHref=\"/enterprise-server@latest/admin/overview/about-upgrades-to-new-releases\"\u003eto GitHub Enterprise Server\u003c/a\u003e.\u003c/p\u003e\n\u003cp\u003eFeature-based versioning provides named \"feature flags\" that simplify the maintenance and versioning of documentation. You can use a single feature name (or \"flag\") to group and version prose throughout content. When a feature comes to additional products, you only need to make a change to the YAML versioning in the file within \u003ccode\u003edata/features/\u003c/code\u003e.\u003c/p\u003e\n\u003ch3 id=\"managing-features\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#managing-features\"\u003eManaging features\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eEach feature is managed through individual YAML files in \u003ccode\u003edata/features/\u003c/code\u003e.\u003c/p\u003e\n\u003cdiv class=\"ghd-alert ghd-alert-accent\"\u003e\u003cp class=\"ghd-alert-title\"\u003e\u003csvg version=\"1.1\" width=\"16\" height=\"16\" viewBox=\"0 0 16 16\" class=\"octicon mr-2\" aria-hidden\u003e\u003cpath d=\"M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8Zm8-6.5a6.5 6.5 0 1 0 0 13 6.5 6.5 0 0 0 0-13ZM6.5 7.75A.75.75 0 0 1 7.25 7h1a.75.75 0 0 1 .75.75v2.75h.25a.75.75 0 0 1 0 1.5h-2a.75.75 0 0 1 0-1.5h.25v-2h-.25a.75.75 0 0 1-.75-.75ZM8 6a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z\"\u003e\u003c/path\u003e\u003c/svg\u003eNote\u003c/p\u003e\n\u003cp\u003e\nDo not delete \u003ccode\u003edata/features/placeholder.yml\u003c/code\u003e because it is used by tests.\u003c/p\u003e\n\u003c/div\u003e\n\u003cp\u003eTo create a new feature, first create a new YAML file with the feature name you want to use in this directory. For a feature named \u003ccode\u003emeow\u003c/code\u003e, that would be \u003ccode\u003edata/features/meow.yml\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003eAdd a \u003ccode\u003eversions\u003c/code\u003e block to the YAML file with the short names of the versions the feature is available in. For example:\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-yaml\"\u003e\u003cspan class=\"hljs-attr\"\u003eversions:\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003efpt:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'*'\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003eghec:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'*'\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003eghes:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'\u003e3.1'\u003c/span\u003e\n\u003c/code\u003e\u003c/pre\u003e\n\u003cp\u003eThe format and allowed values are the same as the frontmatter versions property. For more information, see \"\u003ca href=\"https://github.com/github/docs/tree/main/content#versions\"\u003eVersions\u003c/a\u003e\" in the \u003ccode\u003egithub/docs\u003c/code\u003e repository README.\u003c/p\u003e\n\u003ch3 id=\"liquid-conditionals\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#liquid-conditionals\"\u003eLiquid conditionals\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eNow you can use \u003ccode\u003e{% ifversion meow %} ... {% endif %}\u003c/code\u003e in content files!\u003c/p\u003e\n\u003ch3 id=\"frontmatter\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#frontmatter\"\u003eFrontmatter\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eYou can also use the feature in frontmatter in content files:\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-yaml\"\u003e\u003cspan class=\"hljs-attr\"\u003eversions:\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003efeature:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'meow'\u003c/span\u003e\n\u003c/code\u003e\u003c/pre\u003e\n\u003cp\u003eYou can only use one \u003ccode\u003efeature\u003c/code\u003e entry under \u003ccode\u003eversions\u003c/code\u003e, and the value of \u003ccode\u003efeature\u003c/code\u003e can only contain one feature name.\u003c/p\u003e\n\u003cp\u003eYou can combine feature-based versioning and standard versioning in frontmatter. When you do this the article will be included in the superset of all of the versions specified in the feature-based versioning file and directly in the Markdown file. For example, you might have a feature that is currently only available in GHEC, and this is specified in the feature-based versioning. However, you want the \"About\" article for this feature to also be visible in the FPT docs. In this case you could add \u003ccode\u003efpt\u003c/code\u003e and \u003ccode\u003efeature\u003c/code\u003e to the \u003ccode\u003eversions\u003c/code\u003e block in the front matter:\u003c/p\u003e\n\u003cpre\u003e\u003ccode class=\"hljs language-yaml\"\u003e\u003cspan class=\"hljs-attr\"\u003eversions:\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003efpt:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'*'\u003c/span\u003e\n \u003cspan class=\"hljs-attr\"\u003efeature:\u003c/span\u003e \u003cspan class=\"hljs-string\"\u003e'some-new-feature'\u003c/span\u003e\n\u003c/code\u003e\u003c/pre\u003e\n\u003ch2 id=\"best-practices\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#best-practices\"\u003eBest practices\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h2\u003e\n\u003cp\u003eVersioned content impacts the reader, but also impacts anyone who contributes to or reviews the content. Here are a few tips to improve the writing, reading, and reviewing experience for versioning syntax. None of these practices are mandatory and you will find edge and corner cases, but they're intended as useful heuristics to help you think through versioning.\u003c/p\u003e\n\u003ch3 id=\"avoid-unnecessary-versioning\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#avoid-unnecessary-versioning\"\u003eAvoid unnecessary versioning\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eFor the reader, gaining a general understanding is more important than reading details that precisely reflect the differences between particular products or plans. In conceptual or procedural content, try to describe features or portions of the UI in a general way that doesn't require versioning syntax. In addition to being easier for us to maintain, this strengthens understanding for readers who refer to documentation for multiple products.\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003eDo ask yourself, \"can I write this content in a way that applies to all products without any versioning?\"\u003c/li\u003e\n\u003cli\u003eDo try to avoid versioning screenshots if you can, given the effort required to create them. Minor differences between UI copy may not affect understanding. If product-specific text or UI elements exist, but the screenshot still provides helpful context, ask yourself whether versioning the screenshots would affect understanding to a meaningful degree.\u003c/li\u003e\n\u003cli\u003eDon't version prose if you can explain a concept or walk the reader through a procedure without versioning for specific products.\u003c/li\u003e\n\u003c/ul\u003e\n\u003ch3 id=\"when-modifying-an-existing-content-file-review-existing-versioning-early-and-often\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#when-modifying-an-existing-content-file-review-existing-versioning-early-and-often\"\u003eWhen modifying an existing content file, review existing versioning early and often\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eStaying cognizant of existing versioning will help ensure that you write relevant versioning statements, and can help remind you to version new content accurately.\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003eDo review the entire page's versioning in the front matter as soon as you begin editing.\u003c/li\u003e\n\u003cli\u003eDo review the versioning around content that you're editing.\u003c/li\u003e\n\u003cli\u003eDo review the rendered version of changes that you're making, and switch to each available version for the page as part of your self-review.\u003c/li\u003e\n\u003c/ul\u003e\n\u003ch3 id=\"avoid-repetition-as-much-as-possible\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#avoid-repetition-as-much-as-possible\"\u003eAvoid repetition as much as possible\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eUse versioning syntax within a sentence or paragraph to differentiate prose for two different plans or products. A contributor can edit just one paragraph with versioning statements, instead of needing to consider larger blocks of versioned text and modify similar but differently versioned prose in two places. A reviewer can suggest a change once, instead of needing to leave the same suggestion in multiple places. But if the behavior differs dramatically or versioning within the sentence or paragraph becomes complicated or difficult for a contributor to parse, consider repeating yourself to make the prose easier to maintain.\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDo use versioning syntax inline within paragraphs to avoid repeating sentences or entire paragraphs.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003eYou can do {% ifversion fpt %}something{% elsif ghec %}something else{% endif %}.\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp\u003eDo use your judgment: for prose that would be complicated to write or read without lots of versioning syntax within a sentence or paragraph, consider repeating the entire paragraph in a version block for each relevant product.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003e{% ifversion fpt %}\u003c/p\u003e\n\u003cp\u003eIf you use a Free, Pro, or Team plan, you can do something. Here's more information about the things you can do with a Free, Pro, or Team plan...\u003c/p\u003e\n\u003cp\u003e{% elsif ghec %}\u003c/p\u003e\n\u003cp\u003eIf you use GitHub Enterprise Cloud, you can do something else. Here's more information about the things you can do with GitHub Enterprise Cloud...\u003c/p\u003e\n\u003cp\u003e{% endif %}\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003ch3 id=\"be-explicit-not-implicit\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#be-explicit-not-implicit\"\u003eBe explicit, not implicit\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eIf you know exactly which products the content describes, version explicitly for those products. Syntax like \u003ccode\u003enot\u003c/code\u003e, and \u003ccode\u003eelse\u003c/code\u003e in particular, can be imprecise. The end result of \u003ccode\u003enot\u003c/code\u003e and \u003ccode\u003eelse\u003c/code\u003e depend on each article's front matter, so a contributor must do more investigation to understand prose with this versioning. This creates the potential for errors. The complexity of implicit versioning increases in reusables, where articles that reference the reusable may have different versioning, and thus different evaluations of \u003ccode\u003enot\u003c/code\u003e or \u003ccode\u003eelse\u003c/code\u003e. We also occasionally introduce a new version to GitHub Docs when GitHub introduces a new product, which changes the end result of \u003ccode\u003enot\u003c/code\u003e and \u003ccode\u003eelse\u003c/code\u003e when we add the new version to existing articles.\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003eDo remember that GitHub offers four products, and remember that GitHub Docs can display documentation for eight total versions at any given time.\u003c/li\u003e\n\u003cli\u003eDo review an entire article's versioning in the front matter when you begin editing, as this can help you understand how \u003ccode\u003enot\u003c/code\u003e and \u003ccode\u003eelse\u003c/code\u003e will behave in Liquid statements, or change when you enable new versions in the front matter.\u003c/li\u003e\n\u003c/ul\u003e\n\u003ch3 id=\"verify-and-communicate-versioning-as-you-work-through-content-design-and-creation\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#verify-and-communicate-versioning-as-you-work-through-content-design-and-creation\"\u003eVerify and communicate versioning as you work through content design and creation\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eSometimes a change isn't included in the release it was originally intended for. You can save time for reviewers and ensure more accurate content by confirming versioning throughout content design and creation, for both releases and improvements.\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003eDo consider versioning in content design, and do double-check the versioning when you request stakeholder reviews for content creation.\u003c/li\u003e\n\u003cli\u003eDo make the review easier for other writers and stakeholders: point out differences between versions in your request for review, linking to specific rendered versions of the content if necessary.\u003c/li\u003e\n\u003cli\u003eDo trust, but verify.\u003c/li\u003e\n\u003c/ul\u003e\n\u003ch3 id=\"test-test-and-test-again\" tabindex=\"-1\"\u003e\u003ca class=\"heading-link\" href=\"#test-test-and-test-again\"\u003eTest, test, and test again\u003cspan class=\"heading-link-symbol\" aria-hidden=\"true\"\u003e\u003c/span\u003e\u003c/a\u003e\u003c/h3\u003e\n\u003cp\u003eWhether you're writing the content or reviewing the content, pay attention to the content design plan and affected products, and check the rendered content in a staging or development environment to ensure that the content describes each product accurately.\u003c/p\u003e","miniTocItems":[{"contents":{"href":"#how-and-where-to-version","title":"How and where to version"}},{"contents":{"href":"#about-the-different-versions-of-github","title":"About the different versions of GitHub"}},{"contents":{"href":"#versioning-in-the-yaml-frontmatter","title":"Versioning in the YAML frontmatter"}},{"contents":{"href":"#versioning-with-liquid-conditional-operators","title":"Versioning with Liquid conditional operators"}},{"contents":{"href":"#about-feature-based-versioning","title":"About feature-based versioning"}},{"contents":{"href":"#best-practices","title":"Best practices"}}],"permissions":"","includesPlatformSpecificContent":false,"includesToolSpecificContent":false,"defaultPlatform":"","defaultTool":"","product":"","productVideoUrl":"","currentLearningTrack":null,"detectedPlatforms":[],"detectedTools":[],"allTools":{"agents":"Agents","api":"API","azure_data_studio":"Azure Data Studio","bash":"Bash","cli":"GitHub CLI","codespaces":"Codespaces","curl":"curl","desktop":"Desktop","importer_cli":"GitHub Enterprise Importer CLI","javascript":"JavaScript","jetbrains":"JetBrains IDEs","jetbrains_beta":"JetBrains IDEs (Beta)","skillsets":"Skillsets","vimneovim":"Vim/Neovim","powershell":"PowerShell","visualstudio":"Visual Studio","vscode":"Visual Studio Code","webui":"Web browser","windowsterminal":"Windows Terminal","xcode":"Xcode"},"supportPortalVaIframeProps":{"supportPortalUrl":"https://support.github.com","vaFlowUrlParameter":""},"currentLayout":"default"}},"languagesContext":{"languages":{"en":{"name":"English","code":"en"},"zh":{"name":"Simplified Chinese","code":"zh","hreflang":"zh-Hans","nativeName":"简体中文"},"es":{"name":"Spanish","code":"es","nativeName":"Español"},"pt":{"name":"Portuguese","code":"pt","nativeName":"Português do Brasil"},"ru":{"name":"Russian","code":"ru","nativeName":"Русский"},"ja":{"name":"Japanese","code":"ja","nativeName":"日本語"},"fr":{"name":"French","code":"fr","nativeName":"Français"},"de":{"name":"German","code":"de","nativeName":"Deutsch"},"ko":{"name":"Korean","code":"ko","nativeName":"한국어"}}},"__N_SSP":true},"page":"/[versionId]/[productId]/[...restPage]","query":{"versionId":"free-pro-team@latest","productId":"contributing","restPage":["writing-for-github-docs","versioning-documentation"]},"buildId":"s6DUzkqIicbHKjzn5sSgX","isFallback":false,"isExperimentalCompile":false,"gssp":true,"appGip":true,"locale":"en","locales":["en","zh","es","pt","ru","ja","fr","de","ko"],"defaultLocale":"en","scriptLoader":[]}</script></body></html>