A system and/or methodology to track and organize database application data in response to a delete, insert or update procedure. More specifically, a system and/or methodology that employs a version-based retention and linkage approach with respect to triggering implementations is provided....http://www.google.com.hk/patents/US7912819?utm_source=gb-gplus-share專利 US7912819 - Systems and methods for versioning based triggers
