When working with and manipulating XML data and files, a question gets asked as to whether to use the om package, or the xml package.
To understand the difference between these packages, you need to go back into Genero history. At the inception of Genero, there was only the om package, the xml package was introduced later in version 2.10.
Read more at
https://4js.com/ask-reuben/ig-215/