London, UK (29 November 2005)

Dialog, a Thomson business, today announced at the Online Information 2005 conference meeting here this week that it is extending chemical structure searching functionality to its Alerts system. Dialog introduced chemical structure searching on its online service in May 2005.

Dialog Alerts generate automatic e-mail notifications when new content is added that matches a user's search profile to provide current awareness of topics specified by the end user.

Alerts by chemical structure allow users to scan newly added research (such as new drugs in development) to automatically pinpoint targeted chemical structures.

“The new Alerts feature is a significant benefit to researchers, competitive intelligence specialists, legal professionals, regulators and many others with a need to track new developments in pharmaceuticals, chemicals and patents, and a range of business, academic and regulatory pursuits,” said Tom Tankelewicz, Dialog senior director, product development.

Alerts by Chemical Structure are available in three premier databases of chemical and pharmaceutical research available through Dialog: Derwent Chemistry Resource (File 355), Pharmaprojects (Files 128, 928) and Prous Science Drug Data Report (File 452).

Searchers can use any of a number of popular chemical structure drawing software packages that support the industry-standard format for storing chemical structure information (MOL file) to set up Alerts, which are created in DialogLink 5 (Dialog's interface for information professionals with in-depth research needs).

Alerts output may be delivered to any e-mail address and do not require the recipient to have DialogLink 5 installed. The Alert output can be delivered in the user's preferred format with images included in the e-mailed results where relevant.

Research related to millions of chemical compounds, including those found in drug pipelines, is available through Dialog. For more information about Chemical Structure Searching on Dialog, visit www.dialog.com/products/dialoglink/css.shtml.

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About The Thomson Corporation
The Thomson Corporation (www.thomson.com), with 2004 revenues of $8.10 billion, is a global leader in providing integrated information solutions to business and professional customers. Thomson provides value-added information, software tools and applications to more than 20 million users in the fields of law, tax, accounting, financial services, higher education, reference information, corporate e-learning and assessment, scientific research and healthcare. With operational headquarters in Stamford, Conn., Thomson has approximately 38,000 employees and provides services in approximately 130 countries. The Corporation's common shares are listed on the New York and Toronto stock exchanges (NYSE: TOC; TSX: TOC).

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