[xsd-users] Defaults for minOccurs and maxOccurs

[Boris Kolpackov]

Hi Michael,

Forstner Michael <Michael.Forstner at cpg.de> writes:

> IMHO the default for minOccurs and maxOccurs is "1" for both if they 
> are not supplied inside a XSD file.

Correct.


> xsd.exe generates an XXX_optional field or every field insiede a XSD 
> file which is missing minOccurs and maxOccurs attributes.

I think what happens is you have an outer all or sequence compositor
with minOccurs="0" or a choice compositor, for example:

<sequence minOccurs="0">
  <element name="a" type="int"/>
</sequence>

<choice minOccurs="0">
  <element name="a" type="int"/>
  <element name="b" type="string"/>
</choice>

In the C++/Tree mapping the XSD compiler "flattens" the content
model and computes what we call effective minOccurs and maxOccurs
which are then used to decide which set of accessors/modifiers
to generate.

Boris