"Path": "/ref/spec"
}-->

<h2 id="Introduction">Introduction</h2>

<p>
This is the reference manual for the Go programming language.
The pre-Go1.18 version, without generics, can be found
<a href="/doc/go1.17_spec.html">here</a>.
For more information and other documents, see <a href="/">go.dev</a>.
</p>

<p>
Go is a general-purpose language designed with systems programming

    String CRAWLER_DOCUMENT_HTML_CONTENT_XPATH = "crawler.document.html.content.xpath";

    /** The key of the configuration. e.g. //HTML/@lang */
    String CRAWLER_DOCUMENT_HTML_LANG_XPATH = "crawler.document.html.lang.xpath";

    /** The key of the configuration. e.g. //META[@name='description']/@content */
    String CRAWLER_DOCUMENT_HTML_DIGEST_XPATH = "crawler.document.html.digest.xpath";

### Translations

* 🌐 Update Chinese translation for `docs/zh/docs/index.html`. PR [#11430](https://github.com/tiangolo/fastapi/pull/11430) by [@waketzheng](https://github.com/waketzheng).

  // machine-id: http://man7.org/linux/man-pages/man5/machine-id.5.html
  optional string machineID = 1;

  // SystemUUID reported by the node. For unique machine identification
  // MachineID is preferred. This field is specific to Red Hat hosts
  // https://access.redhat.com/documentation/en-us/red_hat_subscription_management/1/html/rhsm/uuid
  optional string systemUUID = 2;

  // Boot ID reported by the node.