XML spec states following VC:Standalone Document Declaration: "The standalone document declaration MUST have the value "no" if any external markup declarations contain declarations of: ...
element types with element content, if white space occurs directly within any instance of those types."
but why so many tools don't report such error?
sample xml document:
<?xml version='1.0' standalone='yes' ?> <!DOCTYPE animal SYSTEM "ibm32i04.dtd" [ <!ATTLIST animal xml:space (default|preserve) 'preserve'> ]> <!-- This is against VC: Standalone Document Declaration in P32 The standalone document declaration has the value "yes", there is an external markup declaration of element with a element only content type, and white space occurs directly within the mixed content. --> <animal><a>This is a