When discussing markup languages, extensibility means that the vocabulary of a language is not wholly predetermined, but is defined by the author Typically, this means that, within the syntactic confines of the metalanguage, the author of an electronic text can choose the elements and their relationships, and then formalize the design in a DTD
Literally means capable of being added In HTML it had meant that new features, commands, and functionality can all be added to the language without "breaking" older documents URL: Short for Uniform Resource Locator, the address of any document on the World WQode Web, eg , http: www com
Capable of being extended, whether in length or breadth; susceptible of enlargement; extensible; extendible; the opposite of contractible or compressible
Having the potential to be expanded in scope, area or size In the case of Dublin Core, the ability to extend a core set of metadata with additional elements
A programming language or a system that can be modified by changing or adding features