E201

For the complete documentation index optimized for AI agents, see llms.txt.

Item Type Not in Schema

Erroneous Code Example

This error occurs when you reference an item type in a query that is not defined in your schema.

QUERY getProduct(id: ID) =>
    product <- N<Product>(id)
    RETURN product

N::User {
    name: String,
}
// Product is not defined

Solution

Define the item type in your schema before using it in queries.

N::User {
    name: String,
}

N::Product {
    name: String,
    price: F64,
}