active pdf/annotated visualization RFC

[Vincent J. Carey, Jr.]

How can R users take advantage of the "active PDF" paradigm
for annotation of statistical graphics?  The basic objective
is to take a small number of locations on a graph and
hyperlink them -- add persistent information to the pdf
rendering of the graph so that when the user clicks
on the location, a browser is (started if necessary and) pointed
to a URL specified by the persistent information.

One possibility is to generate pdf graphical documents with the
existing PDF driver in R and use external software to introduce
active links.  We don't know at present what external software
would be useful for this.

Another possibility is to establish a "text" like function for
use with the pdf driver that allows the user to give vectors
of x and y coordinates and a vector of metadata to be bound to the
coordinates as active link targets.

--

This is a request for advice/comments/plans related to
annotated visualizations created with R but exportable to
non-R users.  Other graphical formats and
languages not mentioned here may be relevant and comments
to this effect are welcome.

-- 
---
Vince Carey, PhD
Ass't Prof Med (Biostatistics)
Harvard Medical School
Channing Laboratory - ph 6175252265 fa 6177311541 cell 8572126768
181 Longwood Ave Boston MA 02115 USA

stvjc@channing.harvard.edu
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