## 6.6.1 Introduction

The following sections describe Profiles in a tabular format.

Each table contains three columns. The first column is a description of the conformance group that the ConformanceUnit is part of. This allows the reader to easily find the ConformanceUnit. This column may also state “Profile” in which case the listed item is not a ConformanceUnit, but an included P rofile. The second column is a brief description of the ConformanceUnit or included Profile. The last column indicates if the ConformanceUnit is optional or required.