[Dfu-util] dfuse endianness question

Hello dfu-utils developers, I have just discovered dfu files and specifically DfuSe files, and I have read the "DfuSe File Format Specification" in UM0391 from ST. In UM0391, each buffer is "represented in Big Endian order". I have undersood that as saying that the 32bits value are stored in big-endian order. Now I see that dfu-utils expects and stores 32bits values in little-endian order. Is there another document that specifies that ? Best regards Philippe