xjc -p <packageName> parameters.xsd

C:\Documents and Settings\Dominique\workspaceCloud\com.ibm.cloud.parameters\src>xjc 
   -p com.ibm.cloud.parameters ../resource/parameters.xsd
parsing a schema...
compiling a schema...
com\ibm\cloud\parameters\DataType.java
com\ibm\cloud\parameters\Field.java
com\ibm\cloud\parameters\ObjectFactory.java
com\ibm\cloud\parameters\OptionType.java
com\ibm\cloud\parameters\Options.java
com\ibm\cloud\parameters\Parameters.java
com\ibm\cloud\parameters\Values.java

String cloudPasswordFile = args[0];
cloudUserId = args[1];
String cloudPassPhrase = args[2];

// Retrieve cloud access information.
cloudPassword = PasswordFileProcessor.getRealPassword(
        cloudPassPhrase, cloudPasswordFile, cloudUserId);
Properties props = new Properties();
props.load(new FileInputStream("cloud.properties"));
address = props.getProperty("address",
        "https://www-147.ibm.com/cloud/enterprise/");

// Set Credential and address.
client.setRemoteCredentials(cloudUserId, cloudPassword);
client.setEndpointAddress(address);

//Search for an image description
Image image = client.describeImage("20004761");

Security.setProperty("ssl.SocketFactory.provider", 
  "com.ibm.jsse2.SSLSocketFactoryImpl");
Security.setProperty("ssl.ServerSocketFactory.provider", 
  "com.ibm.jsse2.SSLServerSocketFactoryImpl");

//Create an http client
HttpClient httpclient = new HttpClient();
Credentials defaultcreds = 
   new UsernamePasswordCredentials(cloudUserId, cloudPassword);
httpclient.getState().setCredentials(AuthScope.ANY, defaultcreds);

//Create the method, it is important to use the escape 
//because the url contains '{' and '}'.
GetMethod httpget = new GetMethod(new HttpsURL(image.getManifest()).getEscapedURI());

//Execute the request
httpclient.executeMethod(httpget);

//Get the result
String result = httpget.getResponseBodyAsString();

//Prepare JAXB
JAXBContext jc;
jc = JAXBContext.newInstance("com.ibm.cloud.parameters");
Unmarshaller u = jc.createUnmarshaller();

//Unmarshal the result
Parameters parameters = (Parameters) u.unmarshal(new StringReader(result));

//Display the parameters
for (Field field : parameters.getField()) {
     System.out.println("Field Name=" + field.getName());
}

<parameters xsi:noNamespaceSchemaLocation=
  "platform:/resource/com.ibm.ccl.devcloud.client/schema/parameters.xsd">
  <field name="userID" label="User ID" type="string"/>
  <field name="userPassword" label="User Password" type="password" 
               pattern="^\w*(?=\w*\d)(?=\w*[a-z])(?=\w*[A-Z])\w*$" 
               patternErrorMessage="Invalid Password. Must contain at least 1 number, 
               at least 1 lower case letter, and at least 1 upper case letter.">
  </field>
  <field name="vncPassword" label="VNC Password" type="password" 
               pattern="^\w*(?=\w*\d)(?=\w*[a-z])(?=\w*[A-Z])\w*$" 
               patternErrorMessage="Invalid Password. Must contain at least 1 number, 
               at least 1 lower case letter, and at least 1 upper case letter.">
  </field>
</parameters>

Field Name=userID
Field Name=userPassword
Field Name=vncPassword