I'm writing to web services and need to signify that a value is null using the attribute xsi:nil="true" rather than leaving an empty tag or no tag.  I can add the attribute to the xml elements and just change the values between true and false but it's messy because xsi:nil="false" is unnecessary because the receiver can figure out that the tag isn't null if it's not set to true.  Is there a cleaner way to do this?


Ex:

<a xmlns:xsi="whateverthenamespaceis">
    <b xsi:nil="true"/>
    <c xsi:nil="false">blablabla</c>
</a>

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V

<a xmlns:xsi="whateverthenamespaceis">
    <b xsi:nil="true"/>
    <c>blablabla</c>
</a>