SEO Glossary Terms: X

This SEO glossary page lists SEO terms related to article writing starting with letter X.

To visit other SEO glossary pages and learn about SEO terms starting with different letters, please scroll down to the bottom of this article.

  • Xenu

In SEO terminology, the Xenu link checker is a small but very powerful program that searches a website for any invalid references.


XHTML is an acronym for eXtensible HyperText Markup Language. The term refers to a family of XML markup languages (modern systems for annotating a document in a way that is syntactically distinct from the text) that mirror or extend versions of the widely-used Hypertext Markup Language (HTML), the language in which web pages are written.

  • XLS files

XLS or eXceL Spreadsheet is a file extension for a spreadsheet file format (a computer application program that simulates a physical spreadsheet by capturing, displaying, and handling data arranged in rows and columns). It was created by Microsoft for use with Microsoft Excel. By default, Google Analytics will not track XLS file downloads because they cannot be tagged with the GATC.

  • XML

XML or Extensible Markup Language is a system for annotating a document by making it syntactically distinguishable from the text. It defines a set of rules for encoding documents in a human-readable and machine-readable format.

  • XML inclusion

XML inclusion is associated to trusted feed programs (also called XML feeds) normally used for large sites (500+ pages). XML inclusion enables RSS content feeds and regularly changing content to be indexed by search engines. Examples are: AltaVista, AlltheWeb, Kanoodle, Google, and Yahoo! XML inclusion usually requires a flat fee for set up and then a per-click fee. However, Google doesn’t charge a fee.

  • XML sitemap generator

A sitemap is the easiest way to get Google to crawl your web site. The best way to accomplish that is by using a sitemap generator. Although sitemap generators are a little difficult to use, they can help you a lot. First, you have to download the sitemap generator you like and upload specific files to your web site, run the program, add the sitemap to your Google Webmaster account, and set the process up. The XML sitemap generator is a little easier to use ( All you have to do is enter the URL, wait for the program to process and the download the file to your computer.

  • XML site maps

An XML site map is a file that lists all the URLs for a web site. It is usually seen only by search engine crawlers.

* This glossary is under construction. The links to pages listing article writing and SEO terminology starting with other letters will be added soon.