EXHIBIT 99.2


                           CERTIFICATION PURSUANT TO
                            18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                 SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Quarterly Report of OneSource Information Services, Inc.
(the "Company") on Form 10-Q for the period ended June 30, 2002 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I,
Roy D. Landon, Chief Financial Officer of the Company, certify, pursuant
to 18 U.S.C. section 1350, as adopted pursuant to section 906 of the
Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d)
of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material
respects, the financial condition and results of operations of the Company.

/s/ Roy D. Landon

Roy D. Landon
Chief Financial Officer
August 14, 2002



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