I like the free flow of information, without any copyright restrictions. So, feel free to copy and use any information you find in the PRD. But, please, with citation of the source. The ideal form of citation is a www link to the related item. This allows other people to verify your information and consider the context.
On the other hand, I consider the internet also as a source of free information. Thus, I feel free to extract information from other www sites, newsgroups and so on and to include this information into the PRD without asking the author of the publication.
Thus, if the PRD contains statements of a given person, this does not mean that this person has submitted it to the PRD. This person may even not know that the PRD exists. If you find your own statement(s) here and don't like this, send me an e-mail. In general, I will remove or anonymize such things.
The PRD also collects some excerpts from scientific literature. I consider scientific literature as public domain, and I think I have the moral right to include long citations from scientific texts into a public domain source. I ask for permission only if I have an e-mail address of the author.
If you think that a citation from an article or book is a violation of your copyright, please send me an information. Usually I will remove the critical parts from the PRD immediately.
If you copy (parts of) the PRD, be aware that some parts of the PRD may violate the copyright of other people.