HTML stands for HyperText Markup Language ("markup language hypertext"), refers to the markup language for web development. It is a standard that serves as a reference for the development of websites in different versions, defines a basic structure and code (called HTML) to define the content of a website, such as text, images, and more. It is a standard by the W3C, an organization dedicated to the standardization of almost all web-related technologies, especially about their writing and interpretation. A web browser can read HTML files and compose them into visible or audible web pages. The browser does not display the HTML tags, but uses them to interpret the content of the page. HTML describes the structure of a semantic web site along with the signals for the presentation, so it is a markup language rather than a programming language.
The Open Document Format for Office Applications (ODF), also known as OpenDocument, is an XML-based file format for spreadsheets, charts, presentations and word processing documents. It was developed with the aim of providing an open, XML-based file format specification for office applications. The standard was developed by a technical committee in the Organization for the Advancement of Structured Information Standards (OASIS) consortium. It was based on the Sun Microsystems specification for OpenOffice.org XML, the default format for OpenOffice.org, which had been specifically intended "to provide an open standard for office documents."