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NLM can give only limited support for those acquiring TOXNET data. If you need information about a field or find an error in the data, please email: tehip@teh.nlm.nih.gov. Since many of the databases are created by other agencies, some problems cannot be corrected immediately.

Attempting to validate the XML data is a common problem. The TOXNET XML files produce well-formed XML data in accordance with W3C specifications. Validating parsers behave differently. Making XML data work for your application may require the services of a professional text programmer.