Slide 49 of 87

In general, you should use relative links, because
You have less to type. It's easier to move a group of documents to another location, because the relative path names will still be valid. However, use absolute pathnames when linking to documents that are not directly related. For example, consider a group of documents that comprise a user manual. Links within this group should be relative links. Links to other documents (perhaps a reference to related software) should use full path names. This way, if you move the user manual to a different directory, none of the links would have to be updated.