| create_rollup_tree | Create a tree for use with 'rollup()' | 
| default_validate_dag | Validate a directed acyclic graph for use with rollup | 
| default_validate_tree | Validate a tree for use with 'rollup()' | 
| df_get_by_id | Get property by key "id" from data frame | 
| df_get_by_key | Get property by key from data frame | 
| df_get_ids | Get ids from a data frame | 
| df_get_keys | Get keys from a data frame | 
| df_set_by_id | Set property by key "id" in data frame | 
| df_set_by_key | Set property by key in data frame | 
| fault_table | Example Fault Tree Data | 
| fault_tree | Example Fault Tree | 
| rollup | Perform recursive computation | 
| test_dag | Example Directed Acyclic Graph | 
| update_df_prop_by_id | Update a property in a data frame with key "id" | 
| update_df_prop_by_key | Update a property in a data frame | 
| update_prop | Update a data set with recursively-defined properties | 
| update_rollup | Update a rollup from a single leaf vertex | 
| validate_df_by_id | Validate a data frame with key "id" for 'rollup()' | 
| validate_df_by_key | Validate a data frame For 'rollup()' | 
| validate_ds | Validates a data set for use with 'rollup()' | 
| wbs_table | Example Work Breakdown Structure Data | 
| wbs_table_rollup | Example Work Breakdown Structure Data After Rollup | 
| wbs_tree | Example Work Breakdown Structure Data |