code: function addCoreInstructions() {
    this._validateInstruction = this.ajv.compile(require('jsonscript/schema/instruction.json'));
    coreInstructions.forEach(function (inst) {
      this.addInstruction(inst, instructionKeywords[inst.evaluate.validatorKeyword], false);
    }, this);
  }
docs: private function to add all standard JSONScript instructions to the interpreter
  @this JSONScript