Attach the points of one path to the location of another path Basically, I want to model a ship hull, but rather than modeling it by hand, I would like to use paths. One way to do that would be to create two sets of paths, where the points of the one set (which would be the ribs) are constrained in two axes by the second set (would run the length of the ship). 

If there are other ways to parametrically model a hull (as opposed to using brushes), those answers are welcome as well.
Not natively no, as far as I know. That sounds like the realm of NURBS based modelling, which is a stranger in Blender lands.

Maybe you should look into ACIS solid based modelling software, or NURBS surfaces modelling tools instead.

Otherwise if you want to stick with Blender maybe look into parametric modelling addons like Animation Nodes, or Sverchok which allow parametric modelling with a node based workflow.

If you want something simpler BSurfaces may also be worth a shot. It allows creating surfaces between bounding curve objects, like lofting, tabbed surfaces or ruled surfaces.