Check whether an specific attribute exists for an HDF5 object
H5Aexists(h5obj, name)An object of class H5IdComponent representing a H5 object
identifier (file, group, or dataset). See H5Fcreate(), H5Fopen(),
H5Gcreate(), H5Gopen(), H5Dcreate(), or H5Dopen() to create an object of this kind.
The name of the attribute (character).
A logical value indicating whether an attribute with name name
exists for the object specified by h5obj.