| hm_add_events | Add events to entities |
| hm_add_periods | Add periods to entities |
| hm_add_values | Add values (or measures) to entities |
| hm_close | Close database file |
| hm_delete_domains | Delete specified domains from project database |
| hm_delete_entities | Delete specified entity elements (events, periods, values) from project database |
| hm_delete_views | Delete specified views from project database |
| hm_export_marks | Export entity marks |
| hm_open | Open database file for use in subsequent heimdall R functions |
| hm_reset | Clear all data inside database |
| hm_set_domain | Create or replace domain |
| hm_set_view | Create or replace view |