The Microsoft Internet Information Server uses an IDC and an HTX file together to get data from an ODBC data source and format it as an HTML document. The IDC file is a text file that contains information on how to connect to an ODBC data source, and also contains an SQL statement to execute. The HTX file is an HTML file that acts as a template; it contains keywords that control how data is formatted, and placeholders specifying where that data is inserted in the HTML document when the data is returned from the data source, as specified in the SQL statement in the IDC file.