You can of course defines XML overriding for properties. If metadata complete is defined, then additional properties (ie at the Java level) will be ignored. Otherwise, once you start overriding a property, all annotations on the given property are ignored. All property level metadata behave in entity/attributes, mapped-superclass/attributes or embeddable/attributes.

    <attributes>
        <id name="id">
            <column name="fld_id"/>
            <generated-value generator="generator" strategy="SEQUENCE"/>
            <temporal>DATE</temporal>
            <sequence-generator name="generator" sequence-name="seq"/>
        </id>
        <version name="version"/>
        <embedded name="embeddedObject">
            <attribute-override name"subproperty">
                <column name="my_column"/>
            </attribute-override>
        </embedded>
        <basic name="status" optional="false">
            <enumerated>STRING</enumerated>
        </basic>
        <basic name="serial" optional="true">
            <column name="serialbytes"/>
            <lob/>
        </basic>
        <basic name="terminusTime" fetch="LAZY">
            <temporal>TIMESTAMP</temporal>
        </basic>
    </attributes>

You can override a property through id, embedded-id, version, embedded and basic. Each of these elements can have subelements accordingly: lob, temporal, enumerated, column.