Table of Contents:
Scope | General Information |
Searching the Database Fields | Advanced
Searching
Stopwords | Limits |
Tools | Changing to this Database from Another Database
Sample Documents | Copyright Information
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Ei Compendex*Plus provides abstracts and full bibliographic citations for worldwide engineering and technical literature and encompasses all engineering disciplines, as well as related fields in science and management. The records in the database are drawn from over 2,600 published journals, conference proceedings and individual conference papers, technical reports, monographs, and other materials.
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| Producer | |||
Engineering Information Inc. |
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Years of Coverage |
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| 1987-present | |||
Segments |
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| CDEX includes 3 multisegments, each comprising 1 or more segments: cdex (7 segments) cdxb (9 segments) cdxz (10 segments) |
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| The limit of databases that you can select for a multifile search session is based upon database segments rather than actual databases. The Ovid multifile segment limit is set at 120 to avoid impacting your search sessions. This database includes 10 total segments. | |||
Default Fields for Unqualified Searches |
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| Abstract (AB) | Heading Word (HW) | Title (TI) | |
| Floating Subheading (FS) | Identifier (ID) | ||
All Display/Print Fields |
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| Abstract (AB) | Entry Week (EW) | Original Title (OT) | |
| Accession Number (AN) | Identifier (ID) | Publication Type (PT) | |
| Article Designator (AD) | Institution (IN) | Sponsor (SA) | |
| Author (AU) | ISBN (IB) | Source (SO) | |
| CAL Classification Codes (CC) | ISSN (IS) | Subject Heading (SH) | |
| CODEN (CD) | Language (LG) | Title (TI) | |
Default Display/Print Fields |
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| Abstract (AB) | Identifier (ID) | Sponsor (SA) | |
| Accession Number (AN) | Institution (IN) | Subject Heading (SH) | |
| Author (AU) | Original Title (OT) | Title (TI) | |
| Conference Information (CF) | Source (SO) | ||
Elements of the Source (SO) Field |
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| Journal Name (JN) | Source Description (SD) | ||
| Publisher (PB) | Year of Publication (YR) | ||
Update Frequency |
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| Monthly | |||
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The following list is sorted alphabetical by field alias. Click a field name to see the description and search information.
| Field Name | Label | Field Name | Label | |
| Abstract | AB | ISSN | IS | |
| Accession Number | AN | Journal Name | JN | |
| Article Designator | AD | Journal Word | JW | |
| Author | AU | Language | LG | |
| CAL Classification Codes | CC | Original Title | OT | |
| CODEN | CD | Publication Type | PT | |
| Conference Information | CF | Publisher | PB | |
| Entry Week | EW | Source Description | SD | |
| Floating Subheading | FS | Sponsor | SA | |
| Heading Word | HW | Subject Heading | SH | |
| Identifier | ID | Text Word | TW | |
| Institution | IN | Title | TI | |
| ISBN | IB | Year of Publication | YR |
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The following list is sorted alphabetically by the two-letter label, and includes the relevant alias, at least one example for all searchable database fields, and a description of the field.
| AB | Abstract [Word Indexed] velocity profile.ab. |
The abstract field contains an English-language summary of the original document. Abstracts appear for all records, except for Conference Papers between 1982 and 1984. The abstract index contains all searchable words from the abstract. Stopwords such as "the" and "of" are not searchable in abstracts. |
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| AD | Article Designator [Phrase Index] general review.ad. |
The Article Designator (AD) field is used to specify the orientation or approach taken in the document, or an aspect of the treated topic. There are eight Article Designators (or "Treatment Codes") currently in use:
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| AN | Accession Number [Phrase Indexed] 92120156926.an. |
| The Accession Number (AN) field contains a 11-character number assigned to each document to uniquely identify a particular record. The first two digits represent the year, the second two digits represent the entry month, and the last seven digits represent the sequential number within the year. | |
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| AU | Author [Phrase Indexed] |
The Author (AU) index can contain up to 16 author names. The author names are entered into the index in the format of last name followed by names or up to two initials as they appeared on the original article. For example, a person named James C. Smith could appear as Smith James C. Smith J. Charles, Smith JC or Smith J. If there are more than 16 authors, "et al" will appear after the 16th author. Editors and Compilers are listed in the Author field, specified with (ED) or (COMPILER) following the name. |
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| CC | CAL Classification Codes [Phrase Indexed] |
The CAL Classification Codes (CC) field contains numerical categories which segment the literature covered in Compendex*Plus into broad subject areas. CAL Codes are grouped into six general categories which are divided into thirty-eight subject series. These series are further subdivided into 182 specific subject areas whose codes are applied to the articles that EI indexes. Up to six CAL codes can be included in each record. The CAL Codes are represented by up to six digit numbers which form a hierarchy, from broader to narrower. For example, the CAL Code for Electrical Engineering is "70", the Code for Electricity and Magnetism (a narrower term) is "701", and the Code for Electricity: Basic Concepts and Phenomena (a yet narrower term) is 701.1. Prior to 1993 only 3-digit CAL Codes were used; in 1993 the codes were expanded to up to six digits. For the broadest retrieval, enter the two-digit CAL Code. Records indexed with any CAL code beginning with those two digits will be retrieved. To narrow retrieval, enter the three to six digit CAL Code. Enter the longer codes without the separating digits. |
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| CD | CODEN [Phrase Indexed] "50007".cd. |
| CODEN is a standard code that uniquely identifies a serial publication. CODEN are provided in all the journal article records, and in many records for conferences, reports and other serial publications. Searching by CODEN is a reliable way to retrieve records for all documents that have appeared in a particular serial. | |
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| CF | Conference Information [Word Indexed] los angeles.cf. |
| Many publications compile material that was originally presented at conferences. The Conference Information (CF) field contains the Conference title, location, date(s), sponsor(s) and a unique conference number. Note that all papers presented at a conference are assigned the same conference number. Individual words are posted in the Conference Information index. Standard abbreviations such as those used for institutions are used for the institutional and geographical portions of the CF field (such as "Coll" for College, "Co" for Company, "Dept" for Department, etc). | |
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| EW | Entry Week [Phrase Indexed] 9622.ew. |
The Entry Week (EW) field contains a 4-digit number in the format YYWW representing the year and week in which an item was entered into the Compendex*Plus database. Data through April of 1993 was indexed according to entry month; beginning with entry week 22 in 1993, data has been indexed by entry week. If you are searching data before April 1993, search for the year and entry month using the 4 digit syntax YYMM. For data from May 1993 forward, search using the syntax YYWW. |
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| FS | Floating Subheading [Word Indexed] steel.fs. |
| Any controlled vocabulary term (either a major or a minor heading) can be accompanied a subheading for greater specificity. Only one subheading is permitted per subject heading. When combined with a subject heading, subheadings give a very precise idea of what an article covers. Subheadings were used prior to 1993 only. | |
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| HW | Heading Word [Word Indexed] oxides.hw. |
| Sometimes you may wish to retrieve every subject heading that includes a particular word; this may be done by searching the single word in the Heading Word (HW) field. | |
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| IB | ISBN [Phrase Indexed] 1-56091-360-6.ib. |
| The ISBN (IB) field contains the International Standard Book Number (ISBN), and any qualifying text in parentheses. The ISBN appears as a number separated by hyphens. ISBN have been used in EI records since 1985. Use hyphens when you enter the ISBN you wish to search. | |
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| ID | Identifier [Word Indexed] |
The Identifiers (ID) field contains "Free language terms" which are uncontrolled indexing terms. Identifiers provide specificity in indexing that is not available using controlled vocabulary, and include the natural language of the author, state-of-the-art terminology, and utilization of proper and trade names. Up to six free language terms can be assigned to each record. These terms are an integral part of the EI indexing system and, in many cases, subsequently become part of EI's controlled vocabulary. |
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| IN | Institution [Word Indexed] tufts.in |
| The Institution (IN) field contains name of the organization with which the first author is affiliated, along with the location of the organization, including city, state or province, and country. Enter the single most descriptive word in the institution (e.g. enter "harvard," not "university.") | |
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| IS | ISSN [Phrase Indexed] 0360-5442.is. |
| The ISSN (IS) field contains the International Standard Serial Number (ISSN), a standard international code which uniquely identifies a serial title. The ISSN appears as a number separated by hyphens. ISSNs have been used in EI records since April, 1979. Use hyphens when you enter the ISSN you wish to search. | |
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| JN | Journal Name [Phrase Indexed] |
The Journal Name field contains the full name of the journal in which an article was published. This field displays as part of the Source (SO) field. Journal names are indexed as phrases -- to view journal titles in the index, enter as many of the words or letters in a journal name as are needed to distinguish it from other journals: e.g. enter "cognitive" for "Cognitive Science." Stopwords such as "of" are included in the journal name index but when "The", "A", or "An" is the first word of a journal, it has been stripped. |
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| JW | Journal Word [Word Indexed] solid state.jw. |
The Journal Word (JW) field contains individual words for every journal name in Compendex*Plus. Stopwords such as "the" or "of" are not included. This field is used to retrieve every occurrence of a journal which includes a particular word, such as "engineering." |
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| LG | Language [Phrase Indexed] |
The Language field (LG) contains the language(s) of publication of an article. The language name is indicated by a 3-letter code (such as FRE for French). The language of the original document is also indicated as a separate statement in the Abstract field if this language is not English. The Language index can be scrolled quickly to determine all languages which appear in Compendex*Plus. For a spelled-out list of languages see the listing in Limits/Languages. |
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| OT | Original Title [Display Only] |
| -for display only; not searchable- | |
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| PB | Publisher [Word Indexed] acoustics.pb. |
| The Publisher (PB) field contains the publisher information for any non-journal publications, such as conference and monographic citations. In citing conference literature, the name, place and date of the conference is provided. | |
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| PT | Publication Type [Phrase Indexed] conference paper.pt. |
The Publication Type (PT) field is used to describe the type of source publications from which indexed papers are taken. The following eight publication types are currently in use:
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| SA | Sponsor [Word Indexed] ibm.sa. |
| The Sponsor (SA) field contains the names and locations of up to six organizations credited with sponsoring a conference. Individual words from the SA field are posted to the index. Enter the most descriptive word for an organizational name to search for the Sponsor. The word "sponsor" can also be searched in this field to retrieve all citations with a sponsor. | |
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| SD | Source Description [Word Indexed] |
The Source Description (SD) field contains bibliographic information about the source document, including year and month of publication, volume and issue numbers, and pagination. Source description appears for journal articles only. The source description displays as part of the Source (SO) field. |
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| SH | Subject Heading [Phrase Indexed] |
The Subject Headings (SH) field contains up to nine controlled vocabulary terms used to index the content of a document in the most specific and consistent way possible. Subject Headings which describe the major point, or focus of an article, are preceded with an asterisk (*). Prior to 1993 Subject Headings were selected from close to 13,000 combinations of terms listed alphabetically in the EI Vocabulary. Beginning in 1993 Subject Headings are selected using the EI Thesaurus. Subject Headings are indexed as phrases and should be searched as they appear in the EI Reference Sources. |
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| TI | Title [Word Indexed] internal combustion.ti. |
The Title (TI) field contains the English language version of a title. If the document is written in a language other than English, an English language translation is provided in this field. Stopwords such as "of" or "the" will display in documents, but do not appear in the Titles index. However, the word "a", which is a stopword in other fields can be searched in the title. For documents which were not written in English, the original or transliterated title usually appears in the Original Title (OT) field. |
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| TW | Text Word (TI, AB and ID fields) high energy.tw. |
| The Textword (TW) field is an alias for all of the fields which contain text words and which are appropriate for a free text search. The Textword fields in Compendex*Plus include the Title (TI), Abstracts (AB), and Identifiers (ID) fields. | |
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| YR | Year of Publication [Word Indexed] 1996.yr. |
| The Year (YR) field contains the year in which the article or monograph was published. Only the last two digits of the year appear in the index, but the year can be searched as two or four digits. Years must be searched individually; do not enter a range of years. The year is normally displayed as part of the Source (SO) field. | |
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You can use special words and symbols to combine search terms and refine a search. For efficient searching, use the most appropriate operator from the list below to combine search terms. For more information on these and other searching techniques, including command line syntax searching, refer to the Ovid Gateway Help.
| Operator | Syntax | Example | Results |
| OR | OR | truss bridge or suspension bridge | Retrieves records that contain either term or both terms. |
| AND | AND | bridge and fatigue | Retrieves records that contain both terms. |
| NOT | NOT | levee not new orleans | Retrieves records that contain the first term but not the second term. |
| ADJ | ADJ | vibration damage | Retrieves records that contain both terms, in order, and adjacent in the same sentence. |
| ADJn | truss adj3 cantilever | Retrieves records that contain both terms, in either order, with no more than n number of words between.. The example will retrieve records containing the phrase, "numerical simulations of truss structures and cantilever beam ". | |
| FREQ | x.fd./FREQ=n | levee.ab. /freq=5 | Retrieves records that contain n occurrences of the term in the specified field. The example will retrieve records containing the word "levee," at least five times in the Abstract (ab) field. |
| $ | x$ | rat$ | The unlimited truncation symbol, $, retrieves records that contain the search term and all possible suffix variations of a root word. The example will retrieve records containing words such as rat, rats, rate, rationalize, ratify, etc. |
| x$n | dog$1 | The limited truncation symbol, $n, Retrieves records that contain the search term and all possible suffix variations of a root word with the maximum number of characters that may follow the root word or phrase, specified by n. The example will retrieve records containing words such as dog and dogs, but not dogma. | |
| # | # | wom#n | The mandated wildcard symbol, #, retrieves records that contain the search term with substituted character(s) in the specified locations. The example will retrieve records containing woman and women. |
| ? | ? | colo?r | The optional wildcard symbol, ?, retrieves records that contain the search term with either no characters substituted, or with substituted character(s) in the specified locations. The example will retrieve records containing color and colour. |
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Words of little intrinsic meaning that occur too frequently to be useful in searching text are known as stopwords. You cannot search for the following stopwords by themselves, but you can include them within phrases by placing the entire phrase within quotation marks.
| a | by | here | nearly | resulting | this |
| about | can | how | neither | same | those |
| after | could | however | no | seem | through |
| again | did | if | nor | seen | thus |
| against | do | in | not | several | to |
| all | does | into | now | should | under |
| almost | done | is | obtain | show | up |
| also | during | it | obtained | showed | upon |
| although | each | its | of | shown | use |
| always | either | itself | often | shows | used |
| among | enough | just | on | significant | using |
| an | especially | kg | only | significantly | various |
| and | etc | km | or | since | very |
| another | followed | largely | other | so | was |
| any | following | like | our | some | we |
| approximately | for | made | out | such | were |
| are | found | mainly | over | suggest | what |
| as | from | make | overall | than | when |
| at | further | may | per | that | whereas |
| be | give | might | perhaps | the | which |
| because | given | min | possible | their | while |
| been | giving | mm | previously | theirs | with |
| before | had | more | quite | them | within |
| being | hardly | most | rather | then | without |
| between | has | mostly | really | there | would |
| both | have | must | regarding | these | |
| but | having | n | resulted | they |
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| Abstracts: A limit to Abstracts will restrict retrieval to documents which include an abstract. Close to 100% of Compendex*Plus records after 1987 contain abstracts. | |
| Sentence Syntax: | limit 1 to abstracts |
| Command Syntax: | ..l/1 ab=y |
| Article Designators: A limit to Article Designator will restrict retrieval by any of the Article Designators (or "Treatment Designators") indexed in Compendex*Plus, including such classifications as "General Review" and "Literature Review/Bibliography." If you choose this option you will be presented with an alphabetical list of Article Designators, and a definition for each, from which to select. | |
| Sentence Syntax: | limit 1 to general review |
| Conference Papers: A limit to Conference Papers will restrict retrieval to documents which are indexed with this Publication Type. | |
| Sentence Syntax: | limit 1 to conference papers |
| English Language: A limit to English restricts retrieval to articles which are written in the English language. Foreign language articles do include abstracts but these will be eliminated by a limit to English. | |
| Sentence Syntax: | limit 1 to english |
| Command Syntax: | ..l/1 en=y |
| Full Text: A limit to Full Text will restrict retrieval to those citations for which there is a full text link. Both Ovid full text and external full text are included in this limit. | |
| Sentence Syntax: | limit 1 to full text |
| Journal Articles: A limit to Journal Articles will restrict retrieval to documents which are indexed from journals. Use this limit to eliminate the retrieval of any of the other available Publication Types. | |
| Sentence Syntax: | limit 1 to journal articles |
| Languages: A limit to Language will restrict retrieval to any of the languages indexed in Compendex*Plus. If you choose this option you will be presented with an alphabetic list of those languages from which to select. | |
| Sentence Syntax: | limit 1 to french |
| Command Syntax: | ..l/1 lg=fre |
| Latest Update: New documents are added to Compendex*Plus at regular intervals. A limit to latest update will restrict retrieval to documents which were most recently added to the database. | |
| Sentence Syntax: | limit 1 to latest update |
| limit 1 to update | |
| Command Syntax: | ..l/1 up=y |
| Ovid Full Text Available: A limit to Ovid Full Text Available will restrict retrieval to those citations for which an Ovid full text link is available. | |
| Sentence Syntax: | limit 1 to ovid full text available |
| Publication Types: A limit by Publication Type will restrict retrieval by any of the publication types indexed in Compendex*Plus, including such classifications as "Conference Proceeding" and "Monograph Chapter." If you choose this option you will be presented with an alphabetical list of publication types, and a definition for each, from which to select. | |
| Sentence Syntax: | limit 1 to dissertation |
| Publication Year: You can restrict retrieval to any of the years which this database covers. If you choose this option you will be prompted to enter the desired year: the format is 4 digits; "1989" or a range "1994-1995". | |
| Sentence Syntax: | limit 1 to yr=1996 |
| Command Syntax: | ..l/1 yr=96 |
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The following tools are available for this database. For specific information on using these tools, refer to the Ovid Gateway Help.
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| Command Syntax: | ..c/cdex |
| Sentence Syntax: | use cdex |
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<Sample 1> Accession Number 97073476075 Title Optimal integration of humid air cycle in energy intensive industries Author Hansen, Mogens Weel. Nielsen, Jan Sandvig. Institution dk-TEKNIK, Soborg, Den Source American Society of Mechanical Engineers (Paper) 1996. ASME, New York, NY, USA.. p 1-10. Conference Information Proceedings of the 1996 ASME Turbo Asia Conference. Jakarta, Indonesia. 19961105-19961107. Conference Code: 45762. Subject Headings Cogeneration plants Industrial heating Thermodynamics Energy utilization Electric power generation *Compressed air motors Abstract Humid Air Turbine cycle (HAT) is characterized by its high single cycle efficiency. The HAT cycle is typically constrained by a pinch point at low temperature. This indicates that additional heat in the range 100 degree C to 200 degree C can be utilized with high marginal efficiency. At the same time energy intensive industries (for example refineries, Cement production plants and Steel works) typically have a surplus of heat from around 250 degree C to 300 degree C and down. This study is aimed at the integration of HAT Cycle into the industrial process plant where the complementary features can be exploited. The present paper has two main objectives. The first objective is to present a general approach for integration analysis. The approach is based on conceptual design using targeting procedures (e.g. Pinch Analysis). The second objective is to find an optimum integration scheme for specific heat sources available from industrial sites. To illustrate both objectives a case study based on real refinery data is discussed. (Author abstract) [References: 8] Publication Type Conference Paper Language English Identifiers Humid air turbine (HAT) cycle, Optimum integration scheme, Process integration CAL Classification Codes Pneumatic Equipment and Machinery [632.4]. Steam Power Plants [614]. Process Heating [642.1]. Thermodynamics [641.1]. Energy Utilization [525.3]. Electric Transmission and Distribution [706]. Article Designator General Review. Entry Week 9707 <Sample 2> Accession Number 96413293171 Title Seismological evidence for differential rotation of the Earth's inner core Author Song, Xiaodong. Richards, Paul G. Institution Columbia Univ, New York, NY, USA Source Nature. v 382 n 6588 Jul 18 1996. p 221-224. Subject Headings Seismology Rotation Earth (planet) Anisotropy Tectonics Wave propagation Three dimensional Mathematical models Wave transmission *Seismic waves Abstract The travel times of seismic waves that traverse the Earth's inner core show a small but systematic variation over the past three decades. This variation is best explained by a rotation of the inner core that moves the symmetry axis of its known seismic an isotropy. The inferred rotation rate is on the order of 1 degree per year faster than the daily rotation of the mantle and crust. (Author abstract) [References: 34] ISSN 0028-0836 Publication Type Journal Article Language English Identifiers Inner core, Seismic anisotropy, Mantle, Crust CAL Classification Codes Earthquake Measurements and Analysis [484.1]. Space Physics [657]. Physical Properties of Gases, Liquids and Solids [931.2]. Geology [481.1]. CODEN NATUAS Article Designator Theoretical. Experimental. Entry Week 9641
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(C) Copyright Engineering Information, Inc., 1997. All rights reserved. This database, including text, data selection, and format are proprietary to Engineering Information, Inc.; and title and sole ownership remains Engineering Information, Inc.'s. No part of this database may be duplicated, or reproduced in hard copy, machine readable format or any other form without written permission of Engineering Information Inc. Engineering Information Inc. makes no warranty whatsoever as to the accuracy or completeness of any of the data or results obtained from using the information contained therein, and shall not be responsible for any claims attributed to errors, omissions or other inaccuracies in the information contained in the database.
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Field Guide Revised November 16, 2005
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