NonLinearClickTracking in vast 4.2 is changed to only occur once

[iewrer]

In 4.2 XSD schema, it's changed but the annotation said it could occur many times(unbounded), which is confusing. What's more, current schema could be not backward-compatible due to this change.

Also, the same annotation is found for ClickThrough.

Should we just modify XSD schema to make NonLinearClickTracking and ClickThrough to reflect the annotation?

<xs:element name="NonLinearClickTracking" minOccurs="0" maxOccurs="1">
        <xs:annotation>
          <xs:documentation>URLs to ping when user clicks on the the non-linear ad unit. This can occur zero to many times (unbounded). The XSD syntax can't represent that.</xs:documentation>
        </xs:annotation>