a client-side implementation of the rsync algorithm. It allows updating of files from a remote Web server without requiring a full download or a special remote server application.
an Open Source Probabilistic Information Retrieval library, a highly adaptable toolkit to allow developers to easily add advanced indexing and search facilities to their own applications.
A function prototype is a multimethod function if one or more of its parameters are qualified with the keyword virtual. Implementations of a multimethod function have the same name plus a trailing underscore, and have static in place of virtual qualifiers
parser attempts to conform, as much as possible, to the DOM Level 1 specification. Being written in JavaScript, it lacks some fundamental abilities found in other parsers, like loading XML data from a file or validating from a DTD.