Terms and Definitions

Cascading Style Sheets (CSS) - is a stylesheet language used to describe the presentation (that is, the look and formatting) of a document written in a markup language. Its most common application is to style web pages written in HTML and XHTML, but the language can be applied to any kind of XML document, including SVG and XUL
http://en.wikipedia.org/wiki/Css

Unicode - is a computing industry standard allowing computers to consistently represent and manipulate text expressed in most of the world's writing systems.
http://en.wikipedia.org/wiki/Unicode

XML - The Extensible Markup Language (XML) is a general-purpose specification for creating custom markup languages.[1] It is classified as an extensible language, because it allows the user to define the mark-up elements. XML's purpose is to aid information systems in sharing structured data, especially via the Internet, [2] to encode documents, and to serialize data; in the last context, it compares with text-based serialization languages such as JSON, YAML and S-Expressions.
http://en.wikipedia.org/wiki/XML

GXL (Graph eXchange Language) is designed to be a standard exchange format for graphs. GXL is an XML sublanguage and the syntax is given by an XML DTD (Document Type Definition). This exchange format offers an adaptable and flexible means to support interoperability between graph-based tools.
http://en.wikipedia.org/wiki/GXL

JavaScript - is a scripting language widely used for client-side web development. It was the originating dialect of the ECMAScript standard. It is a dynamic, weakly typed, prototype-based language with first-class functions. JavaScript was influenced by many languages and was designed to look like Java, but be easier for non-programmers to work with.
http://en.wikipedia.org/wiki/JavaScript