<xsd:element name="observationStartDate" type="AdjustableOrRelativeDate" minOccurs="0">
<xsd:annotation>
<xsd:documentation xml:lang="en">The start of the period over which observations are made which are used in the calculation Used when the observation start date differs from the trade date such as for forward starting swaps. Observation Start Date in accordance with the ISDA 2002 Equity Derivatives Definitions. Observation Period Start Date in accordance with the ISDA 2011 Equity Derivatives Definitions.</xsd:documentation>
</xsd:annotation>
</xsd:element>
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