LibreOffice has been on the offensive lately, taking the time to call out Microsoft and its practices whenever it can. Now, it is at it again, accusing Microsoft of "intentionally" using "unnecessarily complex" file formats to achieve user lock-in with its Microsoft 365 (Office) documents. For those who don't know, XML is a markup language that programs like Microsoft 365 and LibreOffice use to structure and define documents. As LibreOffice puts it: An XML schema comprises the structure, data ty...