gras_datadesc_struct_append(host_desc,"name",gras_datadesc_by_name("string"));
gras_datadesc_struct_append(host_desc,"exp_size",gras_datadesc_by_name("int"));
gras_datadesc_struct_close(host_desc);
gras_datadesc_struct_append(host_desc,"name",gras_datadesc_by_name("string"));
gras_datadesc_struct_append(host_desc,"exp_size",gras_datadesc_by_name("int"));
gras_datadesc_struct_close(host_desc);