The Web Consortium's XML Linking working group is developing specifications
to enable more advanced hypertext functionality on the Web: in particular
fine-grained anchors, external annotation, and bidirectional links. This pa
per examines basic goals and approaches; describes HTML linking limitations
XML Linking seeks to overcome; and surveys the Working Group's primary spe
cifications: XPath, XPointer, and XLink. As of this writing, the last two,
while well advanced, are not final recommendations, and so are subject to c
hange. Consult the W3C Web site for the latest versions.