| COMPARE_STRUCT | Compare all matching Tag names and return differences |
| COPY_STRUCT | Copy Fields with matching Tag names from one structure to another |
| CREATE_STRUCT | Create an IDL structure from a list of tag types and dimensions |
| MRD_STRUCT | Like CREATE_STRUCT but tag values can be specified in a string |
| PRINT_STRUCT | Print specified tags from structure (to LUN if given) |
| TAG_EXIST | Determine if a tag exists in a given structure |
| WHERE_TAG | Like WHERE but works on a structure tag names |