The "standalone" in an XML declaration is meaningless if DTDs aren't being used, right?

Hi Folks,

Consider this XML declaration:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

The "standalone" part is relevant only when using DTDs, right? That is, the "standalone" in an XML declaration is meaningless if DTDs aren't being used, right?

Suppose DTDs aren't being used and the XML declaration has standalone="no" ... what does that mean? is it an error?

/Roger