Production Rules

$3

$3

Merchant Rules

$3

id>num
id<=str
!(id:str)
id:(str | str)
id:((str | str) | str)
(id id:num
id:!num
id:!(num | num)
id:(num | !num)
id:id
id>id
(((id>num)))
(id>(num))
id.id:(id.id | str | num) | id.id.id:id.id
id>num + num
id<= num + (num * num) / num - num

$3

Open brackets:

(((id>num))
Mix of _prop_ ":" _expr_ and _prop_ _expr-op_ _expr_

id:(id>num)

Special Rules

$3

#### Left-hand side:

Can be ambiguous, e.g. amount, where amount is an identifier which can be found as a property on several properties.

#### Right-hand side:

Can't be ambiguous, it must refer to a string, number or a unique identifier, e.g. "uniqueIdentifier.amount". An ambiguous identifier will be interpreted as a string.

What is What?

- 3.14 => number
- identifier | identifier.identifier => property or properties
- unique_identifier.identifier => property
- .identifier => property if the identifier is a property of the base object, otherwise string.
- 1.B2 => string
- card.3d.secure => property
- 20-12-24 => string
- 20 - 12 - 24 => algebraic expression (uses whitespaces around the operators.)
- "20 - 12 - 24" => string. ("" forces an)
- Violation of the rules gives red underlining.