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Support : Dialog Search Aids
: Classification Codes and Headings in Dialog File 8
Classification Codes and Headings in Dialog File 8 —
Ei Compendex®
CAL Classification Codes (CC=). The CAL classification codes comprise a numeric classification scheme that segments the literature in the database into broad technical subject areas. The scheme consists of over 190 technical disciplines. A primary heading is assigned to each document to reflect its main subject emphasis.
Classification Codes are arranged into six broad categories and further divided into 36 subject series.
Each document may be assigned one to six classification codes. The number of codes depends on the content of the article. CAL classification codes have three-digit numbers, and can be EXPANDed to include narrower subject areas.
For example, EXPAND CC=660 see all the all codes from 660 to 664, the codes for Automotive Engineering.
Then SELECT "E" reference numbers for items of interest:
?EXPAND CC=660
E3 2 CC=660 (AUTOMOTIVE ENGINEERING)
E4 13951 CC=661 (AUTOMOTIVE ENGINES & RELATED EQUIPMENT)
E5 5285 CC=661.1 (AUTOMOTIVE ENGINES)
E6 1187 CC=661.2 (AUTOMOTIVE ENGINE COMPONENTS)
E7 25849 CC=662 (AUTOMOBILES & SMALLER VEHICLES)
E8 23109 CC=662.1 (AUTOMOBILES)
E9 2295 CC=662.2 (SMALLER VEHICLES)
E10 1585 CC=662.3 (AUTOMOBILE & SMALLER VEHICLE MATERIAL
E11 15404 CC=662.4 (AUTOMOBILE & SMALLER VEHICLE COMPONEN
E12 8000 CC=663 (BUSES, TRACTORS & TRUCKS)
E13 9366 CC=663.1 (HEAVY DUTY MOTOR VEHICLES)
E14 4673 CC=663.2 (HEAVY DUTY MOTOR VEHICLE COMPONENTS)
E15 22 CC=663.3 (HEAVY DUTY MOTOR VEHICLE APPLICATIONS
E16 6863 CC=664 (AUTOMOTIVE ENGINEERING, GENERAL)
?SELECT E9
S1 2295 CC='662.2' (SMALLER VEHICLES) |
CAL codes are particularly useful for searching terms in their appropriate context.
For example, the phrase Computer Simulation has been used as a main heading or subheading in many different subject areas, so it will retrieve a high number of postings. The following example restricts the occurrence of the phrase to records indexed as CC=691.2, Materials Handling Methods:
?SELECT COMPUTER(W)SIMULATION AND CC=691.2
S2 1058 COMPUTER(W)SIMULATION AND CC=691.2
?TYPE S2/KWIC,CC
2/KWIC,CC/1
DIALOG(R)File 8: Ei Compendex(R)
(c) 2009 Elsevier Eng. Info. Inc. All rights reserved.
Classification Codes:
723.5 (Computer Applications)
731.1 (Control Systems)
902.1 (Engineering Graphics)
913.1 (Production Engineering)
663.1 (Heavy Duty Motor Vehicles)
691.2 (Materials Handling Methods)
703.1 (Electric Networks)
713 (Electronic Circuits)
714 (Electronic Components & Tubes)
715 (Electronic Equipment, General Purpose & Industrial)
914 (Safety Engineering)
921 (Applied Mathematics)
712 (Electronic & Thermionic Materials)
408 (Structural Design)
421 (Strength of Building Materials; Mechanical Properties)
422 (Strength of Building Materials; Test Equipment & Methods)
608 (Mechanical Engineering, General)
621 (Nuclear Reactors)
672 (Naval Vessels)
Descriptors: Computer simulation; Design; Electronics industry; Failure
analysis; Loading; Mechanical engineering; Safety engineering; Strain
rate; Transient analysis; *Assembly
Identifiers:
Classification Codes:
...Heavy Duty Motor Vehicles)
691.2... |
CAL codes can also be used to broaden a concept and increase retrieval.
In the following example, retrieval is increased by SELECTing the CAL code for Coal Mining (CC=503) and then combining terms for coal mining from the Descriptor and Identifier fields:
?SELECT CC=503 AND COAL(W)(MINE? ? OR MINING)/DE,ID
S3 12372 CC=503 AND COAL(W)(MINE? ? OR MINING)/DE,ID
?TYPE 3/8
3/8/1
DIALOG(R)File 8: Ei Compendex(R)
(c) 2009 Elsevier Eng. Info. Inc. All rights reserved.
1210292679 E.I. COMPENDEX No: 20093812320733
Mine backfill design study for Barapukuria coal mine, Dinajpur, Bangladesh
Publication Date: 20090701
Descriptors: Coal; Coal industry; Coal mines; Filling; Longwall mining;
Materials properties; Metal recovery; Mines; Mining; Roofs; Subsidence;
Surfaces; *Mine roof control
Identifiers: Bangladesh; Caving mining methods; Coal face; Coal mining;
Coal pillar; Coal recovery; Compressive strain; Degree of curvature;
Design studies; Fill materials; Filling methods; Filling process; Ground
surfaces; Hydraulic filling; In-situ; Integrated tools; Lateral
deformation; Longwalls; Mining areas; Mining operations; Mining problems;
Planning and design; Roof caving; Slicing mining; Strata movement
Classification Codes:
604.2 (Machining Operations)
619.2 (Tanks)
691.2 (Materials Handling Methods)
801.4 (Physical Chemistry)
914.1 (Accidents & Accident Prevention)
931.2 (Physical Properties of Gases, Liquids & Solids)
503.1 (Coal Mines)
483.1 (Soils & Soil Mechanics)
502.1 (Mine & Quarry Operations)
502.2 (Mine & Quarry Equipment)
483.2 (Foundations)
951 (Materials Science)
531 (Metallurgy & Metallography)
911 (Cost & Value Engineering; Industrial Economics)
913 (Production Planning & Control; Manufacturing)
931 (Applied Physics Generally)
524 (Solid Fuels)
402 (Buildings & Towers)
405 (Construction Equipment & Methods; Surveying)
421 (Strength of Building Materials; Mechanical Properties)
423 (Non Mechanical Properties & Tests of Building Materials)
503 (Mines & Mining, Coal) |
Note that the previous example retrieves references to coal mine, mines, mined, and mining, but not coal minerals.
CAL classification codes and their corresponding headings may be obtained by EXPANDing in the CC= index:
?EXPAND CC=500
Ref Items Index-term
E1 2234 CC=484.2 (SECONDARY EARTHQUAKE EFFECTS)
E2 8135 CC=484.3 (EARTHQUAKE RESISTANCE)
E3 0 CC=500
E4 10717 CC=501 (EXPLORATION & PROSPECTING)
E5 6138 CC=501.1 (EXPLORATION & PROSPECTING METHODS)
E6 71 CC=501.2 (EXPLORATION & PROSPECTING INSTRUMENTA
E7 26290 CC=502 (MINES & QUARRY EQUIPMENT & OPERATIONS)
E8 27679 CC=502.1 (MINE & QUARRY OPERATIONS)
E9 7225 CC=502.2 (MINE & QUARRY EQUIPMENT)
E10 19794 CC=503 (MINES & MINING, COAL)
E11 4864 CC=503.1 (COAL MINES)
E12 2308 CC=503.2 (COAL MINING OPERATIONS)
E13 183 CC=503.3 (COAL MINING EQUIPMENT)
E14 17831 CC=504 (MINES & MINING, METAL)
E15 623 CC=504.1 (LIGHT METAL MINES)
E16 26 CC=504.2 (LIGHT METAL MINING)
E17 7068 CC=504.3 (HEAVY METAL MINES)
E18 55 CC=504.4 (HEAVY METAL MINING)
E19 518 CC=504.5 (URANIUM MINES)
E20 11 CC=504.6 (URANIUM MINING)
E21 16509 CC=505 (MINES & MINING, NONMETALLIC)
E22 1611 CC=505.1 (NONMETALLIC MINES)
E23 119 CC=505.2 (NONMETALLIC MINING OPERATIONS)
E24 155 CC=505.3 (NONMETALLIC MINING EQUIPMENT)
E25 2010 CC=506 (MINING ENGINEERING, GENERAL) |
Codes of three or more digits, if known, may be SELECTed directly with the CC= prefix. For example:
?SELECT CC=671.2
S4 6451 CC=671.2 (SHIP EQUIPMENT)
?TYPE 4/6,CC/1
4/6,CC/1
DIALOG(R)File 8: Ei Compendex(R)
(c) 2009 Elsevier Eng. Info. Inc. All rights reserved.
1210293246 E.I. COMPENDEX No: 20093812321326
Maclaurin series-based Lagrangian method for economic dispatch with
valve-point effect
Publication Date: 20090918
Classification Codes:
921.5 (Optimization Techniques)
723.4 (Artificial Intelligence)
705.2 (Electric Generators)
671.2 (Ship Equipment)
617.2 (Steam Turbines)
921 (Applied Mathematics)
612 (Internal Combustion Engines) |
Cal Classification Heading (CC=): The CAL Classification Headings corresponding to Classification Codes are also searchable with the CC= prefix. Classification headings have been indexed both by individual words and by complete phrases in the CC= index. Headings may be SELECTed, enclosed within parentheses, as single words, using proximity operators, or as complete phrases with the CC= prefix. For example:
?SELECT CC=(OCEAN(W)ENGINEERING)
S5 21266 CC=(OCEAN(W)ENGINEERING)
?SELECT CC=AIR POLLUTION
S6 60493 CC=AIR POLLUTION
?TYPE S6/6,CC/1
6/6,CC/1
DIALOG(R)File 8: Ei Compendex(R)
(c) 2009 Elsevier Eng. Info. Inc. All rights reserved.
1210293407 E.I. COMPENDEX No: 20093812321607
On the theory relating changes in area-average and pan evaporation
Publication Date: 20090701
Classification Codes:
802.3 (Chemical Operations)
708.2 (Conducting Materials)
817.1 (Plastics Products)
641.1 (Thermodynamics)
443.1 (Atmospheric Properties)
408.1 (Structural Design, General)
804 (Chemical Products Generally)
451 (Air Pollution) |
As can be seen from the following example, only the first 46 characters of a heading are displayed in an EXPAND list, but the complete heading displays in the record:
?EXPAND CC=MECHANICAL
Ref Items Index-term
E1 361710 CC=MEASUREMENTS
E2 314515 CC=MEASURING
E3 918105 *CC=MECHANICAL
E4 88753 CC=MECHANICAL & MISCELLANEOUS MEASURING INSTRUMEN
E5 84271 CC=MECHANICAL DESIGN
E6 39672 CC=MECHANICAL DEVICES
E7 10121 CC=MECHANICAL DRIVES
E8 16858 CC=MECHANICAL DRIVES & TRANSMISSIONS
E9 10937 CC=MECHANICAL ENGINEERING, GENERAL
E10 28 CC=MECHANICAL ENGINEERING, PLANT & POWER
E11 24342 CC=MECHANICAL INSTRUMENTS
E12 14428 CC=MECHANICAL TRANSMISSIONS
E13 92966 CC=MECHANICAL VARIABLES MEASUREMENTS
E14 748979 CC=MECHANICS
?SELECT E4
S7 88753 CC='MECHANICAL & MISCELLANEOUS MEASURING INSTRUMEN'
?T S7/CC
7/CC/1
DIALOG(R)File 8: Ei Compendex(R)
(c) 2009 Elsevier Eng. Info. Inc. All rights reserved.
Classification Codes:
933.2 (Amorphous Solids)
931.2 (Physical Properties of Gases, Liquids & Solids)
922.1 (Probability Theory)
641.2 (Heat Transfer)
652.1 (Aircraft, General)
943 (Mechanical & Miscellaneous Measuring Instruments)
942 (Electric & Electronic Measuring Instruments)
941 (Acoustical & Optical Measuring Instruments)
944 (Moisture, Pressure & Temperature; Radiation Measuring Instruments)
531 (Metallurgy & Metallography)
444 (Water Resources)
443 (Meteorology) |
When lengthy headings are SELECTed as complete phrases, enter the first 46 characters exactly as they appear in the record including exact spacing and punctuation. Truncation may be used with unique word stems, e.g.,
SELECT CC=MECHANICAL & MISC?
The (S) operator, which requires that search terms be in the same subfield in any order, is useful for ensuring that all terms appear in the same heading. For example:
?S CC=(ACOUSTICAL(S)INSTRUMENT?)
S8 98032 CC=(ACOUSTICAL(S)INSTRUMENT?)
?TYPE S8/CC/1
8/CC/1
DIALOG(R)File 8: Ei Compendex(R)
(c) 2009 Elsevier Eng. Info. Inc. All rights reserved.
Classification Codes:
933.2 (Amorphous Solids)
931.2 (Physical Properties of Gases, Liquids & Solids)
922.1 (Probability Theory)
641.2 (Heat Transfer)
652.1 (Aircraft, General)
943 (Mechanical & Miscellaneous Measuring Instruments)
942 (Electric & Electronic Measuring Instruments)
941 (Acoustical & Optical Measuring Instruments)
944 (Moisture, Pressure & Temperature; Radiation Measuring Instruments)
531 (Metallurgy & Metallography)
444 (Water Resources)
443 (Meteorology) |
Use the (W) operator to replace punctuation when SELECTing headings with individual words and proximity operators on the CC= field. Be sure to enclose the search terms within parentheses,
SELECT CC=(OPTICAL(W)DEVICES(1W)SYSTEMS)
EXPANDing in the CC= index is recommended to verify the exact term.
Last modified on 15 Sep 2011.
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