<window_frame_units xmlns="http://www.sqlparser.com/xml/ansi2003"> <kw_rows>{1,1}</kw_rows> <kw_range>{1,1}</kw_range> </window_frame_units>
<xs:element name="window_frame_units"> <xs:complexType> <xs:choice> <xs:element ref="kw_rows"/> <xs:element ref="kw_range"/> </xs:choice> </xs:complexType> </xs:element>