These are quotes as to why XML is important or about the nature of XML

XML is a great persistence model for storage of schema-free data (and sometimes schema-fixed data). However, XML is not a natural model to do aggregation, consolidation, and analytics from various data source

XML has no dependencies on the programming language type, operating system platform, databases type, or even human languages and that makes it the perfect data format to allow programmers to build cross platform applications.