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Where XML is used

communication between backend systems (XML messages)
- the fastest and the cheapest integration in a heterogeneous environment
- can be built on the top of web-services stack
data format of choice for various applications
- XML based formats guarantee access to data for a long period of time
- XML based formats are more open and improve automatic processing
- all mainstream applications (including MS Office and OpenOffice) are converting to XML based formats
description of configuration for complex systems
- more robust then plain text files