Esta é minha configuração atual:

XSD

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns="http://stock.com/schemas/services/stock"
    xmlns:tns="http://stock.com/schemas/services/stock"
 xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  elementFormDefault="qualified"  targetNamespace="http://stock.com/schemas/services/stock">

<xsd:element name="Stock">
    <xsd:complexType>
        <xsd:sequence>
            <xsd:element name="ticker" nillable="true" type="xsd:string"/>
            <xsd:element maxOccurs="unbounded" minOccurs="0" name="quotes" nillable="true" type="Quote"/>
        </xsd:sequence>
    </xsd:complexType>
</xsd:element>

<xsd:complexType name="Quote">
    ........
</xsd:complexType>
.......
<xsd:element name="gethighBetaStockResponse">
    <xsd:complexType>
        <xsd:sequence>
            <xsd:element name="stock" ref="Stock" minOccurs="1" maxOccurs="unbounded"/>
        </xsd:sequence>
    </xsd:complexType>
</xsd:element>

WSDL

<?xml version="1.0" encoding="UTF-8"?><definitions targetNamespace="http://stock.com/schemas/services/stock/wsdl"
    .....xmlns:external="http://stock.com/schemas/services/stock"
<import namespace="http://stock.com/schemas/services/stock" location="Stock.xsd" />
<message name="getStockQuoteResp">
    <part name="parameters" element="external:getStockQuoteResponse" />
</message>

No entanto, o momento ref = "Stock" é alterado para type = "Stock", o wsdl2java começa a dar Type {http://stock.com/schemas/services/stock}Stock é referenciado, mas não definido.

De alguma forma, parece um confronto entre as importações wsdl e xsd - mas eu simplesmente não consigo resolver isso. A ajuda é apreciada.