Using Centric Tools

// Establish connectivity information
CRMConnection crm = new CRMConnection();
crm.setUrl("http://www.yourorg.com/centric");
crm.setId("www.yourorg.com");
crm.setCode("password");
crm.setClientId(clientId);
//Specify anchors
crm.setLastAnchor("2007-09-02 12:00:00.000");
crm.setNextAnchor("2007-09-22 12:00:00.000");

//Add Meta Info with fields required
ArrayList meta = new ArrayList();
meta.add("name");
meta.add("accountNumber");
meta.add("contractEndDate");
crm.setTransactionMeta(meta);

DataRecord accounts = new DataRecord();
accounts.setName("accountList");
accounts.setAction(DataRecord.SYNC);
crm.load(accounts);

XML

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<app>
  <authentication>
    <id>127.0.0.1</id>
    <systemId>4</systemId>  
    <clientId>1</clientId>
    <code>792fef441691aa41135a15c1478a5ee4

<lastAnchor>2007-09-02 12:00:00.000</lastAnchor>
<nextAnchor>2007-09-22 12:00:00.000</nextAnchor>
</authentication>
<transaction>
<meta>
<property>name</property>
<property>accountNumber</property>
<property>contractEndDate</property>
</meta>
<accountList action="sync"/>
</transaction>
</app>
</code>