The limits of XML mean the limits of my data world

[Roger L Costello <costello@mitre.org>]

Hi Folks,

The philosopher Ludwig Wittgenstein wrote:

"The limits of my language mean the limits of my world."

XML is a language. 

What are the limits of XML?

Would you provide an example of something that cannot be expressed in XML but can be expressed in some other data language, please?

/Roger