复制域 动态域

<field name="item_keywords" type="text_ik" indexed="true" stored="false" multiValued="true"/>

    <copyField source="item_title" dest="item_keywords"/>

    <copyField source="item_category" dest="item_keywords"/>

    <copyField source="item_seller" dest="item_keywords"/>

    <copyField source="item_brand" dest="item_keywords"/>

<dynamicField name="item_spec_*" type="string" indexed="true" stored="true" />