Positioning HTML Elements with Cascading Style Sheets

The HyperText Markup Language (HTML) is a simple markup language used to create hypertext documents that are portable from one platform to another. HTML documents are SGML documents with generic semantics that are appropriate for representing information from a wide range of applications. CSS (Cascading Style Sheets) is a style sheets language that can be applied to HTML to control the style of a document: which fonts and colors to use, how much white space to insert, etc. The following specification extends CSS to support the positioning and visibility of HTML elements in three-dimensional space. Familiarity with both CSS1 and HTML 3.2 are assumed.