A model for describing and interchanging metadata. It allows a Web site to describe its dynamic (user-created) content without having to store static pages that contain that content.

A framework for constructing languages for describing web resources.

RDF integrates a variety of applications from library catalogues and world-wide directories to syndication and aggregation of news, software and content to personal collections of music, photos and events using XML as an interchange syntax. The RDF specifications provide a lightweight ontology system to support the exchange of knowledge on the web.

The esource escription ramework is built upon an XML base and provides a more modern means of accessing data from Internet resources. It can provide metadata (including annotations) for web pages making (among other things) searching more capable. It is also being used to refashion some existing formats like RSS and iCalendar; in the former case it is already in place (at least for newer RSS versions), but it is still experimental in the latter case.

Refuse Derived Fuel An energy resource produced by the separation of combustible materials (refuse) from municipal solid waste. This material is then combined with coal and burnt as a refuse-derived fuel, which is usually 5 to 25 percent refuse.

Refuse Derived Fuel. A fuel produced from combustible waste that can be stored and transported or used directly on site to produce heat and/or power.

The fuel component of municipal solid waste (MSW), which is the by-product of shredding MSW to a uniform size, screening out oversized materials and isolating ferrous material in magnetic separation. The resulting RDF can be burned as a fuel source.

Refuse-Derived Fuel. It is produced by de-watering and compressing wastes, which can then be used as a fuel for cement kilns, incinerators, etc.

Radio Direction Finder.

adio irection inding A rapidly disappearing method of obtaining a bearing at sea on a radio transmitter of know location using a directional antenna manually or electronically steered.

Radio direction finding. Radio location in which only the direction of a station is determined by means of its emission. Since this technique can be used against all electronic emitters, it is sometimes simply referred to as direction finding (DF).

radio direction finding. the art and science of locating a transmitter