Using ParaView with XDMF dataset - why is ParaView truncating Attribute names to 32 characters?

I am a new user of ParaView. My data is in XDMF format, with the “heavy” data in HDF5 format.

I have read most of the data into ParaView successfully, and have also started to plot it, etc.

However, some of my Attribute names are longer than 32 characters. And for some reason, ParaView says it cannot load the data corresponding to those variables.

I guess I want to know what is going on. Is there some fundamental limit, which means I shall have to rename some of my attributes so their names are less than 32 characters long. Or is there some option in ParaView that will allow me to load the missing variables?

(I could supply a fairly simple dataset to illustrate my problem.)