What does "ancillary" describe in a legal context?

In a legal context, "ancillary" refers to auxiliary or supplementary information that supports the main matter at hand but is not the primary focus. This term is often used to describe documents, arguments, or services that provide additional context or service to the primary issue without being the central component themselves. Ancillary elements are crucial for understanding the broader implications of a legal case or for providing necessary background context, yet they are not the core elements that would directly influence the outcome of a case. This is why the notion of ancillary information is vital in legal proceedings; it can enhance understanding and provide essential support to the main arguments without being indispensable on its own.