PartnerLinkType

The partners are the other businesses (web services) the workflow accesses.

Each partner plays a role:

<partnerLinkType name="BuyerSellerLink"
        xmlns="http://schemas.xmlsoap.org/ws/2003/05/partner-link/">
  <role name="Buyer">
    <portType name="buy:BuyerPortType"/>
  </role>
  <role name="Seller">
    <portType name="sell:SellerPortType"/>
  </role>
</partnerLinkType>

Each role is linked to a WSDL PortType.