If you want on-line hypertext with a (La)TeX source, probably on the World Wide Web, there are four technologies to consider:
\
special
commands); there are supporting macro packages for Plain TeX and
LaTeX).
The HyperTeX project extended the functionality of all the
LaTeX cross-referencing commands (including the table of contents)
to produce \
special
commands which are parsed by DVI processors
conforming to the HyperTeX guidelines;
it provides general hypertext links, including those
to external documents.
The HyperTeX specification says that conformant viewers/translators
must recognize the following set of \
special
commands:
html:<a href = "href_string">
html:<a name = "name_string">
html:</a>
html:<img src = "href_string">
html:<base href = "href_string">
The href, name and end commands are used to do the basic hypertext operations of establishing links between sections of documents.
Further details are available on http://arXiv.org/hypertex/; there are two commonly-used implementations of the specification, a modified xdvi and (recent releases of) dvips. Output from the latter may be used in recent releases of ghostscript or Acrobat Distiller.
This question on the Web: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=hyper