How specify app Safari link should use?
How in Safari (6.0) can one specify the app that the target file of a link should use to open that file -- depending on the file's type, as given by its extension?
For example, if a link has target a Mathematica Notebook file like MyWork.nb, then because of that extension .nb, when the link is clicked, the file would open in Mathematica.app?
iMac, OS X Mountain Lion, 3.4GHz Corei7, 16GB, SSD + 2T HD