cmo/set_id /mo_name/ both | node | element /[attribute_name1]/[attribute_name2]

creates integer attributes that contain the node or element number.
if later operations delete nodes or elements causing renumbering, these attributes will contain the original node or element number.
 

cmo/set_id
cmo/set_id/cmo1/node
cmo/set_id/cmo1/element
cmo/set_id/cmo1/both
cmo/set_id/cmo1/node/id_node
cmo/set_id/cmo1/element/id_elem
cmo/set_id/cmo1/both/id_node1/id_elem1

cmo/create/cmo1///hex
createpts/brick/xyz/11,11,11/0.,0.,0./1.,1.,1./1,1,1

cmo/set_id
cmo/set_id/cmo1/node
cmo/set_id/cmo1/element
cmo/set_id/cmo1/both
cmo/set_id/cmo1/node/id_node
cmo/set_id/cmo1/element/id_elem
cmo/set_id/cmo1/both/id_node1/id_elem1
pset/p_xgthalf/geom/xyz/1,0,0/.5,0,0/1,1,1
rmpoint/pset,get,p_xgthalf/inclusive
rmpoint/compress
dump/gmv/set_id.gmv/cmo1