# 3.2 Comparison

_Peios / Advanced Peios / PCDS / LUID_

> LUID equality compares both halves, and monotonic allocation within a boot must not be read as a temporal ordering across sources.

## 3.2.1 Equality

Two LUIDs are equal if and only if both their LowPart and HighPart
fields are identical.

## 3.2.2 Ordering

This document does not define a total ordering for LUIDs.
Although LUIDs are allocated monotonically within a boot session
(see §3.3), consumers MUST NOT rely on numeric ordering to infer
temporal relationships between LUIDs obtained from different
contexts.