Lots of different types of programs use XML as a way to store their data in a standard way, but actually using an XML file for a specific purpose requires that you know what that particular XML file is storing data for.
Ọtụtụ ụdị mmemme na-eji XML dịka ụzọ iji chekwaa data ha n'ụzọ dị mma, mana iji faịlụ XML maka otu nzube chọrọ ka ị mara ihe faịlụ XML ahụ na-echekwa data maka.