> For the complete documentation index, see [llms.txt](https://docs.powerops.app/powerops/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.powerops.app/powerops/best-practices/data-model-rules/edit-rules/create-new-rule.md).
# Create New Rule
Clicking on the “+Add Rule” button prompts a pop-up window with the following fields:
* "Rule Id" is managed internally, alleviating user concerns.
* "Name": For modifying the rule's name.
* "Severity": Adjusts the severity level of the rule, defaulted to "Low."
* "Category": Modifies the rule's category, initially set to the current one.
* "Description": Allows alteration of the rule's description.
* "Scope": Permits the addition or removal of the rule's scope.
* "Rule Expression Editor": Modifies the dynamic LINQ expression for the best practice rule.
Completing all these fields is mandatory to define a rule; leaving any blank isn't allowed.
Furthermore, a "Validate Expression" button checks the validity of the rule expressed in the "Rule Expression Window." This validation ensures the expression conforms to dynamic LINQ standards.
Invalid dynamic LINQ expressions prevent the addition of the rule.
