# 7. Command References

This section is a comprehensive list of command summaries recognized by the Sierra parser. In general, these summaries include the Syntax of how to specify the command, the Scope where it can be used, and a Summary / Description of what effect it has. User inputs are stylized as follows for convenience:

Representation | Description
--- | ---
string | A string (possibly quoted) argument
number | A number (float or integer) input
{enum} | An enumeration of possible options (listed in parameter table). They are enclosed in {} brackets.
[Optional] | Arguments that augment the line but not required. They are enclosed in [] brackets.

The command summaries are included by topic below:

Sierra Commands

- 7.1. Adaptivity Settings
- 7.2. Diagnostic Control
- 7.3. Finite Element Model Parameters
- 7.4. IO Region
- 7.5. Linear Solvers
- 7.6. Material Properties
- 7.7. Rebalance Settings
- 7.8. Solution Control
- 7.9. Transfer
- 7.10. User Functions
- 7.11. User Fields
- 7.12. User Variables
- 7.13. Global Constants

Aria Equation Setup Commands

- 7.14. Boundary Conditions
- 7.15. Equation Specification
- 7.16. Initial Conditions
- 7.17. Sources

Aria Region General Commands

- 7.18. Advective Bar
- 7.19. Bulk Nodes
- 7.20. CDFEM Options
- 7.21. CHEMEQ
- 7.22. Contact
- 7.23. Directed Energy
- 7.24. Element Death
- 7.25. Enclosure Radiation
- 7.26. Ray Trace Source
- 7.27. General Chemistry
- 7.28. Heat Transfer Correlation Coefficient
- 7.29. Level Set
- 7.30. Local Coordinate Systems
- 7.31. Mpmd Coupling
- 7.32. Nonlinear Solve Settings
- 7.33. Skinning
- 7.34. Segregated Solve Settings
- 7.35. Output
- 7.36. Postprocessing
- 7.37. Pressurization Model
- 7.38. Restart
- 7.39. Solution Options
- 7.40. Toggle
- 7.41. Submodel