<xsd:group name="activity">
    <xsd:annotation>
        <xsd:documentation>
				All standard WS-BPEL 2.0 activities in alphabetical order. Basic activities
				and structured activities.
				Addtional constraints:
				- rethrow activity can be used ONLY within a fault handler
				  (i.e. "catch" and "catchAll" element)
				- compensate or compensateScope activity can be used ONLY
				  within a fault handler, a compensation handler or a termination handler
			</xsd:documentation>
    </xsd:annotation>
    <xsd:choice>
        <xsd:element ref="assign" />
        <xsd:element ref="compensate" />
        <xsd:element ref="compensateScope" />
        <xsd:element ref="empty" />
        <xsd:element ref="exit" />
        <xsd:element ref="extensionActivity" />
        <xsd:element ref="flow" />
        <xsd:element ref="forEach" />
        <xsd:element ref="if" />
        <xsd:element ref="invoke" />
        <xsd:element ref="pick" />
        <xsd:element ref="receive" />
        <xsd:element ref="repeatUntil" />
        <xsd:element ref="reply" />
        <xsd:element ref="rethrow" />
        <xsd:element ref="scope" />
        <xsd:element ref="sequence" />
        <xsd:element ref="throw" />
        <xsd:element ref="validate" />
        <xsd:element ref="wait" />
        <xsd:element ref="while" />
        <xsd:element ref="opaqueActivity" />
    </xsd:choice>
</xsd:group>