Once the first block is exhausted, the application is immediately given the rows from the second block that were pre-fetched as DB2 Connect moved ahead and requests the next block.
A business-level application (BLA) is an application administration model that is intended to capture the entire definition of an application, as it makes sense to the business.
By developing your application in this way, your page will have more semantic meaning, as it is more likely to use HTML elements for their intended purpose.
Later, I'll show you how to use address ranges to control which lines a command is applied to — but in the absence of addresses, a command is applied to all lines.