<fields> <field name="id" type="string" indexed="true" stored="true" multiValued="false" required="true" /> <field name="keyword" type="text_ja" indexed="true" stored="true" multiValued="false" required="true" /> <field name="context" type="int" indexed="true" stored="true" multiValued="false" required="true" /> <field name="weight" type="int" indexed="true" stored="true" multiValued="false" requi