What is typically contained in the principal document of a textually similar group?

The principal document of a textually similar group typically contains the most text because it serves as the comprehensive source of information and context for the group. This document is central to the subject matter it addresses, meaning it is designed to convey the primary messages, arguments, or data relevant to that particular topic.

In a textually similar group, documents may include variations or subsets of information, but the principal document acts as the anchor point, providing the most extensive and detailed exposition. In contrast, other documents in the group might contain less text, focus on specific topics, or serve auxiliary purposes such as illustration or supplemental information.