Index - H
| hash | Workflow.Extra |
| Hashable | Workflow.Extra |
| hashWithSalt | Workflow.Extra |
| head | Workflow.Extra |
| headDef | Workflow.Extra |
| headMay | Workflow.Extra |
| headNote | Workflow.Extra |
| HKey | Workflow.Types, Workflow.Core |
| HyperKey | Workflow.Types, Workflow.Core |
| HyperModifier | Workflow.Types, Workflow.Core |