[Nexus-developers] Missing attribute?

["V. Armando Solé"]

Hello,

I've got surprised by the fact the NeXus files I've got from different 
sources do not have an attribute NX_class set to NXroot at the root level.

The web description does not endorse that, but one would really expect it.

It would be the simplest way to test if a just opened HDF5 file is 
supposed to be following NeXus rules.

Best regards,

Armando