If your company buys a content management system, make sure that the
system can export your content so that search engine spiders can crawl
your site.

What does "export your content" mean?
 
Also if all of the websites content comes from a database, how and can
the content be crawled / indexed?
 
One of our clients would like their marketing department to be able to
change text on any page, add pages, and add links to pages all
dynamically.  So basically the whole website will be located in the
database, how and can this be crawled / indexed?
 
Thanks,
Dave