First, let me state that currently the documentation for acceptable standards of data collection is rare. Digital Forensic Science, much like computers and the internet, is an ever-evolving technology. For this reason, any information contained within this web site may be out-dated or in some way no longer acceptable.
Also, an excellent resource for digital forensic science is the book, "Digital Evidence and Computer Crime" by Eoghan Casey, published in 2000 on Academic Press. Its ISBN is 0-12-162885-X