Thank you very much,Marius,but i noticed that in the link http://design.xwiki.org/xwiki/bin/view/Design/SolrSchema#HDocumentFields also mentioned "version: We need to index the document version (revision, e.g. '2.4') to be able to detect when the index is not up to date (not in sync with the database). This check is performed at XWiki startup for instance (see IndexerJob#addMissing).",what does it means? , can i make some changes of solr config file to achieve this? Solr Schema (Design.SolrSchema) - XWiki<http://design.xwiki.org/xwiki/bin/view/Design/SolrSchema#HDocument… design.xwiki.org Other URLs. The Solr schema configuration file used in XWiki. Description. Introduction; Test Cases; Indexing a Single Entity vs. Multiple Entities; A Mixed Approach ________________________________ From: users &lt;users-bounces(a)xwiki.org&gt; on behalf of Marius Dumitru Florea &lt;mariusdumitru.florea(a)xwiki.com&gt; Sent: Wednesday, March 8, 2017 6:18 PM To: XWiki Users Subject: Re: [xwiki-users] How to search revision comment of a document in xwiki? The name of the corresponding Solr index field is "comment" ( http://design.xwiki.org/xwiki/bin/view/Design/SolrSchema#HDocumentFields ). Solr Schema (Design.SolrSchema) - XWiki<http://design.xwiki.org/xwiki/bin/view/Design/SolrSchema#HDocument… design.xwiki.org Other URLs. The Solr schema configuration file used in XWiki. Description. Introduction; Test Cases; Indexing a Single Entity vs. Multiple Entities; A Mixed Approach Note that only the last version of a document is being indexed. So each time you modify and save a document the corresponding row on the Solr index is updated. Thus you will be able to search only for the comment of the last revision. Hope this helps, Marius On Tue, Mar 7, 2017 at 10:33 PM, gp wang &lt;cetium(a)msn.com&gt; wrote: