Selectors

Selectors identify which JSON object a rule evaluates. They are wrapped in double asterisks: **Name**.

Basic Selectors

A selector maps to a top-level key in the JSON data:

**Person**    →  data.Person
**User**      →  data.User
**Order**     →  data.Order

Selectors can contain spaces:

**driving test**  →  data["driving test"]

Nested Selectors

Use dot notation to reference nested objects:

**user.profile**        →  data.user.profile
**driving test.theory** →  data["driving test"].theory

Interactive Example

Reset

Policy Rule

A **account.settings** is valid if __notifications__ of **account.settings** is equal to true.

Test Data (JSON)

{ "account": { "settings": { "notifications": true } } }

▶ Run

Multiple Selectors

A rule can reference multiple selectors. This is useful for comparing data across objects:

A **Application** gets approved
  if __age__ of **Applicant** is greater than 18
  and __score__ of **CreditCheck** is greater than 700.

Each selector must exist as a key in the provided data:

{
  "Applicant": { "age": 25 },
  "CreditCheck": { "score": 750 }
}

Interactive Example

Reset

Policy Rule

A **Application** gets approved if __age__ of **Applicant** is greater than 18 and __score__ of **CreditCheck** is greater than 700.

Test Data (JSON)

{ "Applicant": { "age": 25 }, "CreditCheck": { "score": 750 } }

▶ Run

Case Sensitivity

Selector names are case-sensitive and must match the JSON keys exactly:

• **Person** matches { "Person": { ... } }
• **person** matches { "person": { ... } }

Articles

Rules start with A or An before the selector. These are required syntax but don’t affect evaluation:

A **Person** gets approved ...
An **Application** is valid ...