For example, if I save this xml file in emacs, it saves it as utf-16 big endian:


<?xml version="1.0" encoding="UTF-16"?>

If I do this in powershell (really a .net method), it saves it as utf-16 little endian (osx or windows):

[xml]$xml = get-content file.xml
$xml.save('file.xml')


________________________________
From: Eli Zaretskii <eliz@gnu.org>
Sent: Friday, May 17, 2019 7:46 PM
To: J S
Cc: npostavs@gmail.com; 35766@debbugs.gnu.org
Subject: Re: bug#35766: emacs saves utf-16 le xml files as utf-16 be

> From: J S <jszabo_98@hotmail.com>
> CC: "35766@debbugs.gnu.org" <35766@debbugs.gnu.org>
> Date: Fri, 17 May 2019 16:57:23 +0000
>
> When an xml file just says encoding="UTF-16", how does an application pick big endian vs little endian?

What is "an application" in this context?