What constitutes an appendix in technical documentation?

An appendix in technical documentation serves as a supplementary section that contains material not part of the main body of the document. This material can include additional data, detailed explanations, or other relevant information that supports the primary content but does not need to be included within the normal flow of the document. By placing this information in an appendix, the main content can remain clear and focused, while still providing valuable resources for readers who seek a deeper understanding or further details.

In contrast, summaries, introductions, and records of changes typically serve different purposes within technical documentation. A summary condenses the main points for quick understanding, while an introduction sets the stage for what is to follow. A record of changes logs updates or revisions made to the document, but none of these functions align with the role and definition of an appendix.