A Data Source Indexing window displays a message stating "Data source indexing is currently turned off. The data source index stores information required to resolve references to the tables, table columns, views, functions, procedures, packages and synonyms for registered data sources. Required to support object name-based features such as Semantic Validation and Code Complete, the data source index provides rapid lookup and assists in verification of object names." The window prompts the user to start the indexing process, with options to "Show this message again" and "No".