#7 Using same id attribute for different element types

[Bludwarf]

I am using SimpleXML for parsing XML to Java objects, but I am not able to parse this file :

<pets>
    <cats>
        <cat id="0" talk="miaou" />
        <cat id="1" talk="MIWAOUHAUOHou" />
    </cats>
    <dogs>
        <dog id="0"/>
    </dogs>
    <mine>
        <cat ref="1"/>
    </mine>
</pets>

Using this Java class :

@Default
@Root(name = "pets")
public class SimpleIds
{
    @ElementList(required = false)
    public ArrayList<Cat> cats;

    @ElementList(required = false)
    public ArrayList<Dog> dogs;

    @Root(name = "cat")
    public static class Cat
    {
        @Attribute
        public String talk;

        public void talk()
        {
            System.out.println(talk);
        }
    }

    @Root(name = "dog")
    public static class Dog
    {

    }

    @Element
    public Mine mine;

    @Root(name = "mine")
    public static class Mine
    {
        @Element
        public Cat cat;
    }
}

And this Serializer :

Strategy strategy = new CycleStrategy("id", "ref");
Serializer serializer = new Persister(strategy);
SimpleIds xml = serializer.read(SimpleIds.class, new File("simpleIds.xml"));
xml.mine.cat.talk();

It throws me :

org.simpleframework.xml.strategy.CycleException: Element '0' already exists

Is it impossible to use this kind of xml files with SimpleXML ? Or is it just a bad xml format ?

PS : If I change cat id="0" to cat id="2" it works like a charm...