Tom,
Generally we want to keep track of everything in the database. The user should never need to know if the content is stored in the database or the filesystem. Using OpenACS you can map content to a URL. (Hypothetically at least 😊
Other content management system that store "objects" in some sort of database so allows access to them through webDAV. A key feature of webDAV is the concept of properties which are additional attributes of a "resource" which is basically whatever "thing" is available at a certain URL.
