I'll also mention that the connection between analogies and spans has come up in discussion on the blog; our good friend Jim Dolan has drawn attention to this. See Toby's comment [here](http://golem.ph.utexas.edu/category/2006/11/a_categorical_manifesto.html#c006085) and the ensuing discussion. | I'll also mention that the connection between analogies and spans has come up in discussion on the blog; our good friend Jim Dolan has drawn attention to this. See Toby's comment [here](http://golem.ph.utexas.edu/category/2006/11/a_categorical_manifesto.html#c006085) and the ensuing discussion. |