New Web of Knowledge Platform

Vladimir Pislyakov pislyakov at HSE.RU
Wed Jul 27 08:56:57 EDT 2011

Dear Joel,

Thank you for your explanation. Please, could you also explain the
discrepanies in the number of records, not citations?

For example, the quiery

(CU=France) AND (PY=2009)
Databases=SCI-EXPANDED, SSCI, A&HCI Timespan=All Years

now produces 78,111 results in V.4 and 52 more in V.5. The discrepancy is
not great, still, what is the reason?

I choose 2009 to minimize effects of database's current dynamics.

Vladimir Pislyakov 
Assistant Director for Electronic Resources Management 
Higher School of Economics Library 
20 Myasnitskaya street 
Moscow, 101000 
Tel.: +7 (495) 6213785
Fax: +7 (495) 6287931
E-mail: pislyakov at 

On Thu, 21 Jul 2011 16:21:29 -0500, Joel Hammond
<joel.hammond at THOMSONREUTERS.COM> wrote:

>Adminstrative info for SIGMETRICS (for example unsubscribe):
>Thank you to our loyal and diligent Web of Knowledge users who have
>raised data issues or discrepancies between V4 and V5. 
>We have identified errors affecting a subset of records that were
>uploaded within the last week. We have isolated the impacted records and
>are diligently working to rectify the problem.  We expect to have these
>data corrected within approximately 2 weeks.  In the interim there will
>be instances where some of these data errors will impact citation counts
>and H-indexes.
>Please also be aware that in most cases where the two versions of Web of
>Knowledge yield different citation counts, it does not indicate error
>but instead reflects enhancements made to the application.  While the
>majority of citation counts between the two versions of Web of Knowledge
>are the same, a small number will be different as a result of new
>methods for record unification.
>Joel Hammond
>Sr Director, Product Management & Development
>Scientific & Scholarly Research
>Thomson Reuters
>O 215-823-3740
>joel.hammond at

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