4. The method of claim 2 , wherein said determining one or more updates relative to the section of content comprises: comparing the copy of the web-based source to the section of content in the electronic document to determine the one or more updates relative to the section of content in the electronic document.
2. The method of claim 1 , wherein said determining one or more updates relative to the section of content comprises: locating the copy of the web-based source downloaded by the web crawler; and determining whether the located copy of the web-based source is more up-to-date relative to the section of content contained in the electronic document.