Ecommerce marketplace integration techniques

Various technologies and techniques are disclosed for integrating ecommerce marketplaces. An ecommerce integration framework has definitions for common data entities that are commonly used by multiple ecommerce marketplaces for listing items. Definitions for common operations that can manipulate the common data entities are provided. An application programming interface is provided that uses the common data entities and common operations to enable enterprise resource planning systems to exchange data in a standardized format with ecommerce marketplaces. Catalogs of items to be sold in ecommerce marketplaces can be created and managed using a customizable structure. The customizable structure enables catalogs to be created in a hierarchical manner with at least one parent catalog and zero or more child catalogs. Data values specified in a respective child catalog override data values specified in the parent catalog. A method for communicating with a particular ecommerce marketplace using an ecommerce integration framework is described.