A vast amount of corporate data is stored in relational databases and, increasingly, in NoSQL databases. In addition, much corporate data is stored in files such as Excel spreadsheets, text files (also known as flat files), and XML files. BIRT Designer supports accessing data in these types of files. BIRT Designer Professional also supports accessing data in BIRT report documents and e.reports. e.reports are reports designed in e.Report Designer Professional, Actuate’s legacy report designer.