Meaning:
Appendix as a legal term, it states that a separate section at the end of any document, report, book or other text that provides information. It contains information that cannot be placed in the main document. Therefore, it relates to references that are contained in the main document.
An Appendix is often understood as that section added at the end of the document, book or report which contains subsidiary matter concerning the main idea of a document, book or any kind of report. It contains data which isn’t essential to elucidate your findings, but it supports the analysis, assists the user to understand the research work and provides background information.