While I appreciate the power and flexibility of SAX parsers, I have also found that they require lots of tedious coding to track where the parser is in the document.

Aspects are also used in AJDT to enforce coding standards, keep track of changes to multiple properties pages, and wrap calls using Eclipse's ISafeRunnable interface.

The EPC system is a technology system which bases on the global uniform coding system. It uses network and RFID technology to identify, track and locate product.