Generate xml schema primary, foreign keys in java

1. How i can make VIN column in auto table as primary key?


2. How i can make ID column in repair table as primary key?


3. How i can make VIN column in repair table as foreign key?


4. Maybe is easy way to auto generate ID(make AUTO INCREMENT)? becouse i just using variable. Something like k=k+1 when record is added

I know that @XmlElement means that it will be element, but how to say that it will be primary key? I know that I need do something with:

<xs:keyref 
and
xs.unique

But how do it in code.

So i need with class auto and repair tables generate xmlschema with primary, foreign keys.

Sorry for my bad english language :/

Here is first table(auto):

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;

@XmlAccessorType(XmlAccessType.FIELD)

@XmlType(name = "Auto",propOrder = {
    "VIN", "Make", "Model", "Year"
})
public class XmlSchemaTypeAuto {
@XmlElement(name="VIN")
String VIN;
@XmlElement(name="Make")
String Make;
@XmlElement(name="Model")
String Model;
@XmlElement(name="Year")
int Year;

public void setVIN(String vin) {
    this.VIN = vin;
}

public String getVIN() {
    return VIN;
}

public void setMake(String make) {
    this.Make = make;
}

public String getMake() {
    return Make;
}

public void setModel(String model) {
    this.Model = model;
}

public String getModel() {
    return Model;
}

public void setYear(int year) {
    this.Year = year;
}

public int getYear() {
    return Year;
}
}

Here is second table(repair):

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlID;
import javax.xml.bind.annotation.XmlType;

@XmlAccessorType(XmlAccessType.FIELD)

@XmlType(name = "Repair", propOrder = {
    "id", "VIN","Description", "Cost"
})

public class XmlSchemaTypeRepair {

    @XmlElement(name="id")
    int id;
    @XmlElement(name="VIN")
    String VIN;
    String Description;
    @XmlElement(name="Cost")
    double Cost;

    public void setVIN(String vin) {
        this.VIN = vin;
    }
    public String getVIN() {
        return VIN;
    }
    public void setDescription(String description) {
        this.Description = description;
    }

    public String getDescription() {
        return Description;
    }
    public void setID(int ID) {
        this.id = ID;
    }
    public int getID() {
        return id;
    }
    public void setCost(double cost) {
        this.Cost = cost;
    }

    public double getCost() {
        return Cost;
    } 
}

Here is two tables(XML schema):

    import java.util.ArrayList;
    import java.util.List;

    import javax.xml.bind.annotation.XmlAccessorType;
    import javax.xml.bind.annotation.XmlElement;
    import javax.xml.bind.annotation.XmlRootElement;
    import javax.xml.bind.annotation.XmlAccessType;

    @XmlAccessorType(XmlAccessType.FIELD)
    @XmlRootElement(name = "AutoRepairList")
    public class XmlSchema {

    @XmlElement(name = "AutoList")
    public Autos auto =new Autos();
    @XmlElement(name = "RepairList")
    public Repair repair =new Repair();

    public XmlSchema(){
        repair.repairs = new ArrayList<XmlSchemaTypeRepair>();
        auto.autos = new ArrayList<XmlSchemaTypeAuto>();
    }
    public void setRepair(List<XmlSchemaTypeRepair> RepairType){
        this.repair.repairs=RepairType;
    }

    public void setAuto(List<XmlSchemaTypeAuto> AutoType){
        this.auto.autos=AutoType;
    }

    public List<XmlSchemaTypeRepair> getRepair(){
        return repair.repairs;
    }

    public List<XmlSchemaTypeAuto> getAuto(){
        return auto.autos;
    }

    }
    class Autos {
      @XmlElement(name = "Auto")
      public List<XmlSchemaTypeAuto> autos;
    }
    class Repair {
      @XmlElement(name = "Repair")
      public List<XmlSchemaTypeRepair> repairs;
    }

From XmlSchema class I get :

    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    <xs:schema version="1.0" xmlns:xs="http://ift.tt/tphNwY">

      <xs:element name="AutoRepairList" type="xmlSchema"/>

      <xs:complexType name="xmlSchema">
        <xs:sequence>
          <xs:element name="AutoList" type="autos" minOccurs="0"/>
          <xs:element name="RepairList" type="repair" minOccurs="0"/>
        </xs:sequence>
      </xs:complexType>

      <xs:complexType name="autos">
        <xs:sequence>
          <xs:element name="Auto" type="Auto" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
      </xs:complexType>

     <xs:complexType name="Auto">
        <xs:sequence>
          <xs:element name="VIN" type="xs:string" minOccurs="0"/>
          <xs:element name="Make" type="xs:string" minOccurs="0"/>
          <xs:element name="Model" type="xs:string" minOccurs="0"/>
          <xs:element name="Year" type="xs:int"/>
        </xs:sequence>
      </xs:complexType>

      <xs:complexType name="repair">
        <xs:sequence>
          <xs:element name="Repair" type="Repair" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
     </xs:complexType>

     <xs:complexType name="Repair">
        <xs:sequence>
          <xs:element name="id" type="xs:int"/>
          <xs:element name="VIN" type="xs:string" minOccurs="0"/>
          <xs:element name="Description" type="xs:string" minOccurs="0"/>
          <xs:element name="Cost" type="xs:double"/>
        </xs:sequence>
      </xs:complexType>
    </xs:schema>

Here is schema what I need: