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(1) (Interface Definition Language, Interface Description Language) A language used to describe the interface to a software component or routine in a manner that is not dependent on a particular programming language or operating system. Because an IDL is independent of language and machine, it enables communications between applications running in different operating environments. For example, the Web Services Description Language (WSDL) discloses the interface for routines that provide Web services. Likewise, the CORBA system, a service oriented architecture (SOA) that predates Web services, uses an IDL. See WSDL and CORBA.

(2) (Interactive Data Language) An interpreted programming language from ITT Visual Information Solutions, Boulder, CO (, formerly Research Systems, Inc., that runs on Windows, Mac and various Unix platforms. It is used to write image processing and visualization applications. Well known products written in IDL include Research Systems' own ENVI software and the RiverTools application from Rivix, LLC.

A Scientific and Aerospace Influence
Initially created for NASA astronomers by David Stern, founder of RSI in 1977, IDL provides high-level commands for accessing images, performing data analyses and displaying 3D objects. IDL includes a complete development environment and also comes as an ActiveX control so that its routines can be accessed from user interfaces written in other languages such as Visual Basic. IDL On the Net, or ION, is a family of products that lets applications be shared across a network. IDL VM (Virtual Machine) is a free runtime utility that allows distribution of compiled IDL code applets.

In 2000, Eastman Kodak acquired RSI as a wholly owned subsidiary, then sold it to ITT Corporation in 2004, along with its Remote Sensing Systems division.
References in periodicals archive ?
A principle postprandial lipoprotein is very-low-density lipoprotein (VLDL), which is processed into intermediate-density lipoprotein (IDL), a potent trigger of atherosclerotic plaque growth.
In addition, the Montreal Heart Study showed an independent contribution of increased VLDL remnants (VLDLRs) plus intermediate-density lipoproteins (IDLs) to the progression of CAD and related clinical events (6).
Partially catabolized TG-rich lipoproteins such as intermediate-density lipoproteins and remnant-like particles (RLP) are considered to be highly atherogenic (5).
Apolipoprotein (apo) E, an arginine-rich glycoprotein with a molecular mass of 34 kDa, is localized on chylomicrons, VLDL, intermediate-density lipoprotein, and HDL particles.
ApoB-48 is required for chylomicron production, and apoB-100 is an essential structural component of VLDL and its metabolic products, intermediate-density lipoprotein (IDL) and LDL.
4 mL) were acquired in duplicate by an automated 360 MHz lipoprotein analyzer, and the lipid methyl signal envelope was decomposed computationally to give the amplitudes of the contributing signals of 16 subclasses [1 for chylomicrons; 6 for VLDL; 1 for intermediate-density lipoprotein (IDL); 3 for LDL; and 5 for HDL].
Because each VLDL, intermediate-density lipoprotein, and LDL particle contains only a single apo B molecule, the serum apo B concentration is a close reflection of the number of such particles present.
Familial type III hyperlipoproteinemia is a genetic disorder in which the plasma concentrations of both cholesterol and triglycerides are elevated as a result of the accumulation of chylomicron remnants and intermediate-density lipoproteins (IDL).
In contrast to the earlier two studies, the men whose lipid profiles changed in this test also exhibited an increase in blood concentrations of intermediate-density lipoproteins (IDLs).
Types of lipoproteins include very low-density lipoproteins (VLDL), low-density lipoproteins (LDL), and intermediate-density lipoproteins (IDL).

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