A program that sends a message to a server requesting information. The browser
then displays this information in either text or graphical format.
Common Gateway Interface. CGI scripts are used to process form information once
it is submitted with POST or GET.
Document type definition, a collection of XML declarations that, as a collection,
defines the legal structure, elements, and attirbutes that are available for use
in a document that complies to the DTD. Simply put, it defines how the contents
of the XHTML document are going to be displaed by a browser.
XHTML tags and their content are referred to as elements.