[Therion] hyperlink point

[Bruce]

>i was considering linking to reports, publications, photoes, videos
>from the maps. this would link these other resources to the map,
>allowing the user to jump from the map to a report or a video and 
>so on.
My thought as well.

>i would rather have iconic refs in the pdf (the "usual" file, picture,
>video icons).
These would be OK, or even quite nice, when viewed electronically, but
redundant or even untidy once the map is printed.

>links could be turned off (to prepare maps for publications, with
>a symbol-hide command.
They could, but it means you have to create two maps, one for electronic
viewing and one for paper viewing.  Seems like needless duplication of
authors effort and maintaining separate versions of what are otherwise
identical files.

>not sure whether link should be a property of label/remark
>i use these for the lettering (eg. pit depths).
>maybe there are uses i do not foresee.
The label or symbol for a large stalagmite could double as a hyperlink to
it's photograph (although admittedly there needs to be a cue to the links
existence).  I think in many applications a hyperlink is just another
property to add to existing entities range of properties, like colour, size,
text etc.

What do others think?
I guess it come down to what is expedient to code and what functionality the
pdf format provides.

Bruce