STN International - The Scientific and Technical Information Network

December 2001


CAS Roles modified

CAS roles have been modified effective December 16, 2001. New CAS roles have been added and some general have been replaced with more precise roles. Please check your SDI (current-awareness) profiles to see if they need to be revised. 

For a complete hierachical list of CAS roles, enter HELP ROLES at an arrow prompt in CAPLUS, HCAPLUS, ZCAPLUS, CA, HCA, or ZCA. In each of these files, the CAS Roles thesaurus in the /RL field provides up-to-date information on the definition of each role and the time period when the role has been used. For additional information on using CAS roles, please refer to the updated Quick Reference Card and the revised STNote 5 on CAS roles. Both are available on the CAS Web site at:

1907-1946 data and page images added to CA and CAplus

Effective December 16, 2001, searchable and displayable bibliographic information and abstracts for over 1.6 million records from 1907-1946 are available in the CA/HCA/ZCA and CAPLUS/HCAPLUS/ZCAPLUS files. In addition, page images from 1907-1946 (1st and 4th Collective Indexes) of Chemical Abstracts are also available in these files.


New Fields for DPCI

Two new fields, the Citing Accession Number Count (OSC.G) and Cited Accession Number Count (OSC.D) are now available in the Derwent Patent Citation Index (file DPCI), as of December 3rd, 2001. The new fields are introduced as an extra tool to supplement the corresponding Citing and Cited Patent Number Count fields (PNC.D, PNC.G).

What are the new fields for? The new fields provide search and analysis of the numerical count of cited or citing Derwent WPI records (patent families) , as opposed to individual citing or cited patents. This means that value of, e.g. OSC.G will often be lower than the corresponding PNC.G because OSC.G only counts common citations from equivalent patents in the same Derwent WPI patent family once. Analysis of OSC.G will therefore offer a new, more meaningful, dimension to identifying the most highly cited patents in a search answer set.

For a search Example and explanation visit:
DPCI database summary sheet:


WPIX new and revised

Derwent have finalised the new Derwent Manual Codes which will be introduced into the Derwent World Patents Index (files WPINDEX/WPIDS/WPIX) from January 2002. The changes will be implemented from Derwent WPI Update 200201 onwards. You can view all the new, modified and discontinued codes at:

Derwent have taken this opportunity to include codes to cover new technologies, and to subdivide heavily-posted codes to enable more specific retrieval. If you have any automatic SDIs whithin files WPINDEX, WPIDS or WPIX, which use Manual Codes, please udate your strategies to incorporate these enhancements.


DGENE BLAST Homology Search

FIZ Karlsruhe is pleased to announce the release of BLAST homology searching in file DGENE (Derwent Geneseq) from December 3rd, 2001. DGENE BLAST will supplement the existing specific code match module GETSEQ and FASTA-based homology module GETSIM, to provide DGENE users with a diverse and powerful suite of biosequence analysis tools. RUN BLAST has been implemented in manner very similar to RUN GETSIM, including graphed results, sortable similarity score, ALIGN display, current-awareness ALERT and offline BATCH options.

BLAST is very fast! With the default parameter set-up any sequence subjected to DGENE BLAST will usually complete within 30 seconds, compared to a typical 5-10 minutes with the more elaborate FASTA-based GETSIM. In addition, UPLOAD queries for blast can be up to 10,000 characters in length, compared to just 2000 characters for GETSIM. BLAST has also been implemented in DGENE with many advanced, customisable options available. See HELP BLAST for details. Throughout December 2001 DGENE BLAST searching will be FREE-OF-CHARGE. So try it out!

BLAST(R) software is made available in DGENE with permission from the National Center for Biotechnolgy Information (NCBI) of the National Library of Medicine (NLM). See also, Altschul, Stephen F., Thomas L. Madden, Alejandro A. Schaffer, Jinghui Zhang, Zheng Zhang, Webb Miller, and David J. Lipman (1997), "Gapped BLAST(R) and PSI-BLAST: a new generation of protein database search programs. For further information, please refer to:

GETSIM is based on FASTA methodology, and consequently will often prove to be more sensitive than BLAST, yielding additional hit sequences especially at the lower end of similarity. If you are conducting a comprehensive patent prior-art search, you should consider using both GETSIM and BLAST algorithms to be certain of comprehensive retrieval. 



WELDASEARCH, produced by Cambridge Scientific Abstracts, Bethesda, USA (Copyrigth Holder is The Welding (TWI), UK) is available on STN as of 2 December 2001. 

WELDASEARCH a bibliographic database containing abstracts to journal articles, research reports, books, standards, patents, theses and special publications in the areas of joining metals, plastics and ceramics, metal and ceramic spraying, thermal cutting, brazing, soldering and related topics. Every aspect of welding and allied processes is covered including design, metallurgy, fatigue and fracture mechanics, equipment for joining and cutting processes, corrosion, surfacing, micro joining, quality control, nondestructive testing, savety, commercial applications, market statistics and news of the industry. Citations contain bibliographic information, abstracts and indexing information. The file corresponds to the printed Welding Abstracts and Weldasearch Industry.

Coverage is from 1967 to the present with currently more than 170,000 records. Updating and SDI frequency is monthly. For price information, please see HELP COST in the file. 

The database summary sheet is available online in STNGUIDE (=> S WELDASEARCH/DBN), and on the Web at:



STANDARDS, the international standards database, produced by Deutsches Informationszentrum fuer Technische Regeln (DITR) German Information Center for for Technical Rules, a division of DIN, the German Institute for Standardisation, is available on STN as of 2 December 2001. 

STANDARDS is a bibliographic database containing citations to German, Austrian, Swiss, French, US, Japanese, European and international standards, guidelines and other regulations. Citations contain bibliographic information, indexing (International Classification for Standards (ICS) with texts in German and English), and partly abstracts. Abstracts are available either in German or English, in many cases in both languages. The file contains more than 410,000 records, Update and SDI frequency is monthly.

For price information, please see HELP COST in the file. The database summary sheet is available online in STNGUIDE (=> S STANDARDS/DBN), and on the Web at:

Copyright 2001by FIZ Karlsruhe, Germany - Last Update: