Indexing Structured Information in SharePoint Sources
Two elements are required in order to index the structured information contained in SharePoint: a SharePoint or custom field to indicate how CES should sort the information and a reference to indicate where CES should search for the information. SharePoint fields are built into CES (see Microsoft SharePoint Fields). You can create a custom field to index structured information not extracted by SharePoint fields (see Adding New Properties to SharePoint References). Finally, you can create a new reference or modify an existing one (see Adding and Modifying SharePoint References).