A process for providing seller pre-qualification during the matching phase of an electronic commerce transaction includes a directory structure comprising multiple hierarchically organized product classes, each product class categorizing multiple products and defining one or more attributes of the products categorized in the product class. The process also includes one or more pointers for each product class, each pointer identifying a seller database in which product data enabling a product transaction is stored for products categorized in the product class. The process further includes a search interface configured to communicate a search query for product data only to one or more seller databases associated with sellers having seller attribute values matching the specified seller attribute criteria, these seller databases being identified by the one or more pointers associated with the selected product class.