Abstract: Methods, devices, and system for generating an updated webpage. A computing device may retrieve a product webpage, generate a structural model of the retrieved product webpage, and determine whether the generated structural model matches a stored structural model of another webpage retrieved from the web address. The computing device may extract product information from the generated structural model based on a previously stored mapping of nodes in the stored structural model to the product fields, or generate a mapping and extract the product information from the generated structural model based on the generated mapping, based on whether the generated structural model matches the stored structural model of another webpage retrieved from the web address. The computing device may generate an updated webpage based on the extracted product information.