For
application-specific terms, refer to the help feature of that
application.
Deprecated
Refers to tags that have been superceded by other tags or attributes in later versions of the HTML specifications.
De-skewing
Rotating or straightening an image until the image is no longer at an unwanted angle.
Dynamic HTML. A version of HTML that supports such technologies as CSS and JavaScript so pages can contain animation and interactivity. See DOM.
Describes any system based on discontinuous data or events. Computers are digital machines because at their most basic level they can distinguish between just two values: 0 (off) and 1 (on). See Analog, Modem.
Dithering
A method of varying the pattern of pixels in an image to simulate intermediate colors and create smoother edges. See Pixel, GIF.
Domain Name System. A global network of servers that translates easy to remember addresses like www.about.com into numerical (IP) addresses, such as 207.158.192.40. See IP, URL, Domain Name.
Document Object Model. The specification for how objects such as text, images, headers and links in a web page are represented hierarchically. The DOM defines what attributes are associated with each object and how the objects and attributes can be manipulated. DHTML relies on the DOM to dynamically change the appearance of Web pages after they have been downloaded to a user's browser. See W3C, DHTML.
The name by which a website is known. In the URL http://www.yoursite.com/index.html, www.yoursite.com is the domain name. See IANA, TLD.
Dots per inch. A measure of resolution for an output device such as a laser printer. See PPI, Resolution.
Dynamic
link
A link to a page within a website. Also known as a relative link.
Dynamic
Website
A site that uses a database or scripting to create web pages on demand. The data is often not hard coded into the HTML page but stored in a database. Once a browser requests a page the content is pulled from the database and displayed in the layout template of the HTML document. See Static Website.