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Glossary Definitions

Posted by: | Posted on: October 28, 2017
 CSS #
Cascading Style Sheets. CSS is used to add formatting (style) to web pages (or markup documents in general). CSS was created to make it easier to separate the content of a document with its presentation. It has some other advantages, such as making site-wide style changes easier.

See also:
W3C: Cascading Style Sheets Home Page
Wikipedia: Cascading Style Sheets

 DTD #
A Document Type Definition. For our purposes, a DTD defines the syntax of an specific XML document (such as a SMIL document); it tells a hypothetical computer program what tags and attributes are allowed, and in what order.

See also:
Wikipedia: Document Type Definition

 HTML #
The HyperText Markup Language. A text-based markup language used for creating web pages. HTML was the language that made the web possible, although lately attention is shifting to XML and XHTML.

See also:
W3C HTML Home Page
Wikipedia: HTML

 Macromedia Flash #
Macromedia Flash is a program, browser plugin, and file format for creating and viewing interactive movies. It is similar to SMIL+SVG.

See also:
Macromedia Flash Professional
Wikipedia: Macromedia Flash

 SGML #
The Standard Generalized Markup Language. SGML is a language for defining markup languages. HTML is considered to be an application of SGML. XML was created to be a simpler alternative to SGML.

See also:
Wikipedia: SGML
A Gentle Introduction to SGML

 SMIL #
The Synchronized Multimedia Integration Language. A text-based markup language (similar to HTML), used to add timing and animation to an otherwise static web. SMIL+SVG is similar to Macromedia Flash, but is based on the XML standard.

See also:
W3C Synchronized Multimedia Home Page
Wikipedia: Synchronized Multimedia Integration Language

 SVG #
Scalable Vector Graphics. SVG is an XML language for describing vector graphics.

See also:
Wikipedia: Scalable Vector Graphics
W3C: Scalable Vector Graphics
Wikipedia: Vector Graphics

 URI #
A Uniform Resource Identifier. A URI is a more generic form of a URL (formally, URIs are a superset of URLs). Basically, a URI is just like a URL, but a URI doesn’t have to tell you how to access an object, it only has to name it in a unique way. You can’t necessarily think of a URI as an address like you can a URL, but in practice they are usually the same thing.

See also:
Wikipedia: Uniform Resource Identifier
W3C: Web Naming and Addressing Overview

 URL #
A Uniform Resource Locator. A URL gives a unique name to any internet-accessible document/file. You can think of it as an international postal address, but for the internet. In fact, it’s often referred to as a web address.

See also:
Wikipedia: Uniform Resource Locator
W3C: Web Naming and Addressing Overview

 XHTML #
The eXtensible HyperText Markup Language. XHTML is HTML reborn as an XML document type (HTML is an SGML document type). This makes XHTML easier for computers to read than HTML.

See also:
Wikipedia: XHTML
W3C: What is XHTML?

 XML #
The eXtensible Markup Language. XML is a text-based tree-structured markup language, similar to HTML. It was created as a simpler alternative to SGML. (XHTML is to XML as HTML is to SGML, if that helps.) XML has a wide following and heavy industry support, and is being used in many new ways on the web.

See also:
Wikipedia: XML
W3C: Extensible Markup Language





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