What is the encoding for JSON:API operators?

Question

I'm trying to filter JSON:API results based on the "greater than" operator (>).

The filtering documentation lists the operators:

\Drupal\jsonapi\Query\EntityCondition::$allowedOperators = [
  '=', '<>',
  '>', '>=', '<', '<=',
  'STARTS_WITH', 'CONTAINS', 'ENDS_WITH',
  'IN', 'NOT IN',
  'BETWEEN', 'NOT BETWEEN',
  'IS NULL', 'IS NOT NULL',
];

But it also notes that the symbol operators need to be encoded:

&filter[a-label][condition][operator]=%3D  <- encoded "=" symbol

Which "encoding" is this referring to? What is the encoding for the other operators (>, >=, etc.)? How do I look them up?

Answer 1

Thanks to Hudri, here's the list:

• = %3D
• <> %3C%3E
• > %3E
• >= %3E%3D
• < %3C
• <= %3C%3D