EX_TREE STRUCTURE LXE_TREE
EX_TREE STRUCTURE LXE_TREE OPTIONAL
IN_TREE STRUCTURE LXE_TREE
OUT_TREE STRUCTURE LXE_TREE
EX_TAB STRUCTURE LXE_TREE OPTIONAL
IN_TAB STRUCTURE LXE_TREE
VALUE(EX_TAB) TYPE LXE_TREE
ET_TREE STRUCTURE LXE_TREE