# 2.3 Comparison

_Peios / Advanced Peios / PCDS / GUID_

> GUID equality is byte-for-byte on the binary form; no total ordering is defined, and a specification that needs one must define its own.

## 2.3.1 Equality

Two GUIDs are equal if and only if their 16-byte binary
representations are identical.

GUID comparison MUST be performed on the binary representation,
not on string representations.

> [!NOTE]
> Byte-for-byte comparison of the binary form avoids case
> sensitivity and brace-presence issues that would arise from
> comparing string representations.

## 2.3.2 Ordering

This document does not define a total ordering for GUIDs.
Specifications that require an ordered GUID collection MUST define
their ordering convention explicitly.