Passing on (and elaborating on) a request from Issue 89774:
The manual of each OOo application that supports metadata keywords should include info on how multiple keywords can be entered into the Document Properties dialog. Keywords are separated by commas, and only by commas, and a single keyword may consist of multiple whitespace separated words.
At the moment, I think the only book that mentions the DocProps dialog is the Writer Guide, but it doesn't really go into the importance and use of some of the pages and the fields on them. Probably it should, somewhere in the book.
This is something that probably should be in the other books as well. Metadata is becoming increasingly important for retrieval and other purposes.
--Jean
