To be able to understand clearly the meaning of elementFormDefault I have written 
a short reminder.
Could you please tell me if the following doesn't hold true?

When we have

elementFormDefault="qualified" 

in some scope then in the scope: a locally declared element elm1 must
appear with a prefix (i.e. pre:elm1) or otherwise it must be
implicitly in a namespace of the parent element.  This means that a
locally declared element elm1 in such a scope (and unless it is used as
a root element, what is anyway not the intention) will never violate the
"qualified" restriction because
if it does not have a prefix than it has an implicit namespace of the
parent (which (namespace of the parent) may be empty). However it can
happen that the instance does not validate if the elm1 has not been
declared in that namespace.

When we have

elementFormDefault="unqualified" 

in some scope then in the scope: a locally declared element elm1 is
not allowed to appear with a prefix (i.e. unallowed is pre:elm1) .


                                    
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K.Karamazen
Trinité Automatisering B.V.
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