A web content management system (WCM or WCMS) is a software content management system (CMS) specifically for web content. It provides website authoring, collaboration, and administration tools that help users with little knowledge of web programming languages or markup languages create and manage website content. A WCMS provides the foundation for collaboration, providing users the ability to manage documents and output for multiple author editing and participation. Most systems use a content repository or a database to store page content, metadata, and other information assets the system needs. A presentation layer (template engine) displays the content to website visitors based on a set of templates, which are sometimes XSLT files. Most systems use server side caching to improve performance. This works best when the WCMS is not changed often but visits happen frequently. Administration is also typically done through browser-based interfaces, but some systems require the use of a fat client. Capabilities A web content management system controls a dynamic collection of web material, including HTML documents, images, and other forms of media. A WCMS facilitates document control, auditing, editing, and timeline management. A WCMS typically has the following features: Automated templates Create standard templates (usually HTML and XML) that users can apply to new and existing content, changing the appearance of all content from one central place. Access control Some WCMS systems support user groups, which control how registered users interact with the site. A page on the site can be restricted to one or more groups. This means an anonymous user (someone not logged on), or a logged on user who is not a member of the group a page is restricted to, is denied access. Scalable expansion Available in most modern WCMSs is the ability to expand a single implementation (one installation on one server) across multiple domains, depending on the server's settings. WCMS sites may be able to create microsites/web portals within a main site as well. Easily editable content Once content is separated from the visual presentation of a site, it usually becomes much easier and quicker to edit and manipulate. Most WCMS software includes WYSIWYG editing tools allowing non-technical users to create and edit content. Scalable feature sets Most WCMS software includes plug-ins or modules that can be easily installed to extend an existing site's functionality. Web standards upgrades Active WCMS software usually receives regular updates that include new feature sets and keep the