Xml element value doesn't convert

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XML

convert

Java8

Performing the conversion from XML to Java classes using JAXB statement.But I am facing some problems. That is, it can successfully convert the values in the attributes in the XML tag.But I can't translate the xml tag's own values. For example I want to convert this into my java calsses:
This is my xml tag line:

<tag>value</tag>

and this is my java classes.

@Data
@XmlAccessorType(XmlAccessType.FIELD)
public class element {
    @XmlAttribute(name = "Id")
    private String Id;
    @XmlAttribute(name = "Composite")
    private String Composite;
    private List<subelement> subelement;
}

when generate java classes from xml file it generates values as like

{
                "subelement": null,
                "id": "BGM01",
                "composite": null
}

What I have tried:

as you can see value of tag 220 are not readed. What did I forget?