What does texspace_location and texspace_size mean? in the blender Mesh Data so I was looking through here

and two of the mesh properties are texspace_location and texspace_size?

i was assuming these were uv coordinates and the scale of the uv map, but there are three floats in each one. 

am i correct in my assumption, or am i way off?

also if they are uv coordinates what does the third float in each one mean?
It doesn't have anything to do with UV, it transforms texture space (for box mapping etc.). Turn on Texture Space to see it:



And in Outliner in datablocks view under meshes>your_mesh if you turn off Auto Texture Space you can fiddle with the values and see what they do: