> For the complete documentation index, see [llms.txt](https://docs.editran.onesait.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.editran.onesait.com/documentacion-editran/ibm-editran-v5.3-cics-en/utilities-and-codes/appendix-e.-buffer-files.md).

# Appendix E. Buffer files

They are files that can contain the data corresponding to one or more Transmission Sessions. Each Transmission Session is composed of a control record, with the parameters necessary for the transmission (number of records to send or receive, number of records sent or received, transmission date and time, etc.), and N data records.

There are several types of Buffer files (specific, shared matrix, public, exci matrix, etc.). For more information about the changes, see [Definition and Management of Buffer Files](/documentacion-editran/ibm-editran-v5.3-cics-en/definition-and-management-of-buffer-files.md)

 


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