Document Links and Hyperlinks
Document links and hyperlinks are cross-references between different documents or between different parts of the same document. They facilitate the navigation of users in the document space. However, information seeking by only following hyperlinks is possible only for relatively small collections of hyperlinked documents. Hyperlinks can have explicit or implicit types. Two common types of links are organizational or navigational links and informational links.
Textual documents are rich in structure, one aspect of which is the cross-references or links to different parts of the same document or to other documents. Bibliographic references is one form of links between documents for example. Bush  envisioned Hypertext as a natural way to organize, store and search for information, similar to the associative way in which the humans organize information.
Document links and hyperlinks are explicit cross-references between parts of the same document or different...