Support : Publications : Chronolog Archives : June 2002

From the Experts...

Tip 1: Cascading Class Codes in the Patent Files

Indexing of the International Classification code IC=C07A-021/04 is "cascaded" which means that you can search IC=C07A to retrieve the main class and all of the subclasses under it. The codes are also cascaded at the slash so that you can search IC=C07A-021 to retrieve all similar subclasses. You can also search all codes that start with the stem IC=C07 by entering SELECT IC=C07? ?. Because the system looks only at the characters cascaded to four characters, it will not exceed the 2000 term limit that might otherwise be reached if you truncated the code after the third character.

File 351:Derwent WPI 1963-2001/UD,UM &UP=200211 (c) 2002 Derwent Info Ltd Set Items Description --- ----- ----------- ?s ic=c??? ? Processing Processing S1 2042934 IC=C??? ? ?s ic=c07? ? S2 470632 IC=C07? ?

Ieva Hartwell, Midland, MI USA
Cathy Surles, Knowledge Center USA

Tip 2: Cited Reference Searching

Do you ever need to find out the number of times an author or a publication by an author has been cited by others? How about learning exactly which papers cite him or her? Dialog allows cited reference searching in Social SciSearch® (File 7), Arts & Humanities Search® (File 439), and SciSearch®: a Cited Reference Science Database (Files 34,434). You can also search cited reference files by a subject area or do a OneSearch if you are not sure where your author's subject area may be indexed (e.g., ?BEGIN 7,434,34).

It's important to point out that only the first author is indexed in the CR= field. Thus, you can't just search for a favorite author's citations and hope to retrieve everything. You need to verify who the first author is and use that name.

Topic: Find out who has quoted the article written by Tyler Jacks, in 1992, in Nature (Vol. 359, p. 295) on the effects of an Rb mutation in the mouse. How many times has this publication been cited?

?b 34,434
?e cr=jacks t, 1992

Note: Cited references are indexed under CR= prefix followed by the cited author's name, the year of the cited article, the volume number, the page number cited, and the journal that published the cited article. Cited references are indexed only by the first author of the article.

Ref   Items  Index-term
E1        1  CR=JACKS T, 1991, V157, P93, CURR TO
E2        1  CR=JACKS T, 1991, V359, P295, NATURE
E3        0 *CR=JACKS T, 1992
E4        4  CR=JACKS T, 1992, V259, P295, NATURE
...............................
E10     732  CR=JACKS T, 1992, V359, P295, NATURE

If one paper is frequently cited by others, it could represent a significant contribution.

?s e10
      S1     732  CR="JACKS T, 1992, V359, P295, NATURE"

You can also easily locate all articles citing any work by a given author, using the Cited Author (CA=) field.

?e ca=jacks t

E1        5  CA=JACKS SC
E2        2  CA=JACKS SM
E3     2455 *CA=JACKS T
E4        3  CA=JACKS TA

?s e3
      S2    2455  CA="JACKS T"

?t s2/7,k/1-2

Stella Shandelman, Boston, MA USA

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