v 0 1 0
v -0.942810297 -0.333329707 0
v 0.471405149 -0.333329707 0.816497624
v 0.471405149 -0.333329707 -0.816497624
vn 1.19208849e-07 1 0
vn -0.942809761 -0.333331376 0
vn 0.47140494 -0.333331257 0.816497147
vn 0.47140494 -0.333331257 -0.816497147

  I queried the properties via _vprop()

    size_t n_vprops = mesh.n_vprops();
    for (size_t prop_index=0;prop_index<n_vprops;prop_index++)
    {
        std::cout << boost::format("prop[%1%] is %2% ") % prop_index % mesh._vprop(prop_index).name() << std::endl;
    }

I get the following which I am trying to understand.

prop[0] is v:points
prop[1] is <vprop> 

  I was expecting a string containing "n" or "normals" for prop[1]

  My quest is to find out the different type of attributes are found in the file I read in.

  In my case, the normals are "shared" i.e. number of points is same as number of normals whereas for texture coordinates, they are not shared at all i.e. each face texcoord are "island"