# MANDATORY

> Obligation marker

Record: `pag:keyword-modifier-mandatory`
Kind: keyword
Canonical: https://banes-lab.com/ontology/grammar#pag-keyword-modifier-mandatory

Listed in [Grammar records](https://banes-lab.com/api/records/pag.md), after [REQUIRED](https://banes-lab.com/records/pag/keyword-modifier-required.md) and before [CRITICAL](https://banes-lab.com/records/pag/keyword-modifier-critical.md).

## Grounds

- [substrate-node:constraint](https://banes-lab.com/records/reasoning/substrate-node-constraint.md)