api/src/main/java/javax/faces/component/UIColumn.xml

<?xml version="1.0"?>
<component>
    <component-class>javax.faces.component.UIColumn</component-class>
    <base-class>javax.faces.component.UIComponentBase</base-class>
    <component-type>javax.faces.Column</component-type>
    <component-family>javax.faces.Column</component-family>
    <field proprietary="true" generateProperty="false" saveState="false">
        <name>footer</name>
        <type>javax.faces.component.UIComponent</type>
    </field>
    <field proprietary="true" generateProperty="false" saveState="false">
        <name>header</name>
        <type>javax.faces.component.UIComponent</type>
    </field>
</component>