> Do we want the behavior of almost all current XML processing tools to
suddenly become "incompliant"?
>

Wendell is proposing an application-level house style for use of processing
instructions, a rule for the next level up the protocol stack, which is
perfectly legitimate.

In fact I've heard others propose a stronger convention, namely that
processing instructions should use the syntax of attribute="value" pairs, as
in an element start tag: that's the design convention used for the
xml-stylesheet processing instruction.

Michael Kay
Saxonica