Some parts are extremly ugly, and mostly pointless. namespaces, doctype, processing instructions. This is well-formed xml and good way to confuse people:

Some parts are extremly ugly, and mostly pointless. namespaces, doctype, processing instructions. This is well-formed xml and good way to confuse people: <?xml version="1.0"?><!DOCTYPE abc[<?abc >]]<abc><abc/>]>>?>]><?x?><a/><?x <(x)>>?>