|
|
abstract syntax
<language, data> A representation of data (typically either a
message passing over a communications link or a program being
compiled) which is independent of machine-oriented structures
and encodings and also of the physical representation of the
data (called "concrete syntax" in the case of compilation or
"transfer syntax" in communications).
A compiler's internal representation of a program will
typically be specified by an abstract syntax in terms of
categories such as "statement", "expression" and "identifier".
This is independent of the source syntax (concrete syntax)
of the language being compiled (though it will often be very
similar). A parse tree is similar to an abstract syntax
tree but it will typically also contain features such as
parentheses which are syntactically significant but which are
implicit in the structure of the abstract syntax tree.
(1998-05-26)
Try this search on OneLook / Google
Nearby terms:
abstraction « abstract machine « Abstract Machine Notation « abstract syntax » Abstract Syntax Notation 1 » abstract syntax tree » Abstract-Type and Scheme-Definition Language
This article was derived from the Free Online Dictionary of Computers and is available under ther terms of the GNU Free Documentation License.
Media Recover: File Recovery SoftwareMedia Recover: File Recovery Software Easily recover and fix lost photos, audio and video. Recover files even after accidental deletion, a format or corruption. For digital cameras and all removable media. Windows 98/ME/NT/2000/XP and Mac More ...
GeForce4 MX 440 64MB DDR 8x AGP VCD w/TV-OutGeForce4 MX 440 64MB DDR 8x AGP VCD w/TV-Out ** GeForce4 MX 440 64MB DDR 8x AGP Video Card w/TV-Out **This GeForce4 MX 440 GPU based video cardfeatures 64 MB of DDR memory and an 8x AGPinterface! With its nView multi-display technology, Lightspeed Memory Architecture II, and Acccuview Antialiasing technology, this GeForce4 MX 440 delivers feature-rich graphics technology, performance, and flexibility. Order yours today!General Features:- GeForce 4 MX440-8X GPU- 64 MB DDR RAM- 8x AGP interface- 256-bit graphics architecture- 4 dual-rendering pipelines- nView Display Technology- Cube environment mapping- Dual programmable vertex shaders- Fill Rate: 1.1 Billion Texels/Sec.- Triangles per Second: 34 million- Memory Bandwidth: 8.0 GB/Sec.- Accuview Antialiasing - Lightspeed Memory Architecture (LMA) II- Digital Vibrance Control (DVC)- Microsoft Direct X optimization and support- Complete OpenGL 1.3 and Open GL support- 32-bit color with 32-bit Z/Stencil buffer- Multi-buffering for smooth animation and playbackConnectors:- 15-pin VGA - S-Video TV-OutRegulatory Approvals:- FCC- CERetail Box Includes:- GeForce MX440 64MB DDR AGP Video Card- Driver on CD-ROM- S-Video to Composite cable- Quick Installation Guide Compatibility/Requirements/Disclosures:** Requirements *** Microsoft Windows 98/98SE/NT 4.0/2000/ME/XP* Pentium 4/III/II/Celeron, AMD K6/Athlon or compatible* Available 2x/4x/8x AGP slot* CD-ROM drive * DVD playback requires DVD drive More ...
NEW P4 2.8GHz 256DDR 80GB CDRW/DVD Slim DesktopNEW P4 2.8GHz 256DDR 80GB CDRW/DVD Slim Desktop ** NEW P4 2.8GHz 256DDR 80GB CDRW/DVD Slim Desktop **This fast Pentium 4 System features a slim case design so it makes the perfect space saver. It also has a P4 2.8GHz Processor, 256MB DDR RAM, an 80GB 7200RPM hard drive, and a CDRW/DVD Combo drive. Pick yours up today!General Features:- Intel Pentium 4 2.8GHz Processor- 256MB DDR Memory- 80GB 7200RPM IDE Hard Drive- CDRW/DVD Combo Drive- 1.44 Floppy Drive- Built-in Real 256-bit 2D/3D graphics engine Shared up to 64MB Video Memory- AC97 Integrated Audio- 56K V.90 Data/Fax Modem- Integrated 10/100 Ethernet- Slim Size ATX Power SupplyMotherboard Features:- SiS 651 Series (Northbridge) / SiS962L (Southbridge) Chipsets- One (1) 2X/4X AGP Slot - Three (3) PCI slotsI/O Ports:- Two (2) PS/2 Ports, one for mouse, one for keyboard- One (1) Standard DB-15 VGA Connector- One (1) Standard 25-pin Parallel Port Connector- One (1) Standard 9-pin Serial Port Connectors- Four (4) Standard USB 2.0 Ports (Two on front, two on rear)- One (1) Standard RJ-45 10/100 Ethernet Port-Line-in, Phone-out RJ-11 Jacks on PCI Modem- Line-in, Mic-in, Line-out 3.5mm mini-jacksPackage Includes:- EurekaP4 2.26GHz System- PS/2 Keyboard and Scroll Mouse- Driver Disc- RJ-11 Phone Cable for Modem- Amplified Stereo Speakers - MSI M651 Combo-L Motherboard manual- U.S. Style Power CordCompatibility/Requirements/Disclosures:** Requirements *** Operating system (WinXP,2000,98,etc.)* VGA monitor* Power outlet More ...
Mitsumi 1.44MB Floppy Disk Drive (Black)Mitsumi 1.44MB Floppy Disk Drive (Black) ** Mitsumi 1.44 MB Floppy Disk Drive **This Mitsumi floppy drive offers reliable operation at anamazing price.General Features:- Black bezel- 1.44 MB drive- Activity LED indicator- 3.5-inch form factorRegulatory Approvals:- CE- UL- TUV- CSA- Gost-R- BSMINotes:- Drive only- Mitsumi Model: D359M3D Compatibility/Requirements/Disclosures:** Requirements *** Floppy controller* Floppy cable* Available 3.5-inch drive bay* Available 4-pin power connector More ...
NEC VGA 10.4-Inch Color TFT LCD NL6448BC33-46NEC VGA 10.4-Inch Color TFT LCD NL6448BC33-46 ** NEC VGA 10.4-Inch Color TFT LCD NL6448BC33-46 **General Features:- NL6448BC33-46 - Screen 10.4 diagonal screen - Drive method Amorphous Si TFT active-matrix - Display area 211.2(H) x 158.4(V)mm - Number of pixels 640 x 480 - Display color 262,144 colors - Pixel pitch 0.33(H) x 0.33(V)mm - Pixel arrangement RGB vertical stripe - Luminance 350cd/m2 typical - Backlight 2 cold cathode fluorescent lamps - Backlight inverter None - Contrast ratio 300:1 typical - Viewing angle Up 45o, down 55o, right 70o, left 70o typical - Response time 15ms typical. - Input signals Digital RGB(6bits), dot clock, H-sync, V-sync - Power requirements 3.3V(or 5V) - Power consumption 6.2W typical - Operating temperature 0oC to +50oC - Storage temperature -20oC to +60oC - Outline dimensions 243(W) x 185.1(H) x 11.5 max.(D)mm - Weight Approx. 530g More ...
DK Smart Steps - 1st GradeDK Smart Steps - 1st Grade The Most Complete Learning System for Your Child! Enroll your first grader in the program with more of everything: Smart Steps. Developed by dedicated educators, Smart Steps covers the complete first grade core curriculum to help your child head straight for the top!Windows 95/98/ME/2000/XP and MAC More ...
|
