1. An XML data exchange system comprising a processing unit, comprising: a data aggregator associated with a relational database system, wherein the data aggregator provides a predetermined XML provider file structure to each of a plurality of content providers having proprietary content schemas, wherein the predetermined XML provider file structure has an XML schema that defines a structure of content provider files used to access content from the content providers according to the predetermined XML provider file structure, an exchange mechanism that references content provider files of the content providers, wherein the content provider files of the content providers represent content of the content providers according to the predetermined XML provider file structure; and an import module that retrieves the content provider files of the content providers and imports content contained therein into the data aggregator associated with the relational database system.