Split one string into many fields

[Ryan McKinley]

Is there any easy way to split a string into a multi-field on the server:

given:
<add>
<field name="subject">subject1; subject2; subject- 3</field>
</doc>

I would like:
<add>
<field name="subject">subject1</field>
<field name="subject">subject2</field>
<field name="subject">subject- 3</field>
</doc>

Thanks for any pointers

ryan