Visit the Solr Wiki page for more information: https://cwiki.apache.org/confluence/display/solr/SolrConfigXml

See these sample SolrConfig files for more information (9.8.1):
► ${SOLR_HOME}/configsets/_default/conf/solrconfig.xml
► ${SOLR_HOME}/configsets/sample_techproducts_configs/conf/solrconfig.xml

<config>

    <luceneMatchVersion>9.3</luceneMatchVersion>

    <lib dir="" regex="" />

    <dataDir>${solr.data.dir:}</dataDir>

    <directoryFactory name="DirectoryFactory" class="${solr.directoryFactory:solr.NRTCachingDirectoryFactory}"/>

    <codecFactory class="solr.SchemaCodecFactory"/>

    <indexConfig>

    <jmx />

    <initParams path="/update/**,/query,/select,/tvrh,/elevate,/spell,/browse">
        <lst name="defaults">
            <str name="df">_text_</str>
        </lst>
    </initParams>

    <updateHandler class="solr.DirectUpdateHandler2">
        <updateLog />
        <autoCommit />
        <autoSoftCommit />
    </updateHandler>

    <query>
        <maxBooleanClauses />
        <filterCache />
        <queryResultCache />
        <documentCache />
        <cache />
        <enableLazyFieldLoading />
        <queryResultWindowSize />
        <queryResultMaxDocsCached />
        <listener />
        <useColdSearcher />
    </query>

    <requestDispatcher>
        <httpCaching />
    </requestDispatcher>

    <requestHandler name="" class="">
        <lst />
    </requestHandler>

    <searchComponent path="">
        <str />
        <lst />
    </searchComponent>

    <updateProcessor name="" />

    <updateRequestProcessorChain name="" />

    <queryResponseWriter />

</config>

<initParams path="/update/**,/query,/select,/tvrh,/elevate,/spell,/browse">
    <lst name="defaults">
        <str name="df">_text_</str>
    </lst>
</initParams>

Visit the Solr wiki page for more information: https://wiki.apache.org/solr/SolrRequestHandler

/query [class: solr.SearchHandler]

/browse [class: solr.SearchHandler]

/select [class: solr.SearchHandler]

/elevate [class: solr.SearchHandler] [searchComponent: elevator]

/spell [class: solr.SearchHandler] [searchComponent: spellcheck]

/terms [class: solr.SearchHandler] [searchComponent: terms]

/tvrh [class: solr.SearchHandler] [searchComponent: tvComponent]

/update/extract [class: solr.extraction.ExtractingRequestHandler"]

Visit the Solr wiki page for more information: https://wiki.apache.org/solr/SearchComponent

By default, the following search components are available:

query [class: solr.QueryComponent]

facet [class: solr.FacetComponent]

mlt [class: solr.MoreLikeThisComponent]

stats [class: solr.StatsComponent]

debug [class: solr.DebugComponent]

By default, the following search components have a custom configuration:

elevator [class: solr.QueryElevationComponent]

highlight [class: solr.HighlightComponent]

spellcheck [class: solr.SpellCheckComponent]

terms [class: solr.TermsComponent]

tvComponent [class: solr.TermVectorComponent]

Visit the Solr wiki page for more information: https://wiki.apache.org/solr/QueryResponseWriter

By default, the following query response writers are available:

xml [default: true] [class: solr.XMLResponseWriter]

python [class: solr.PythonResponseWriter]

ruby [class: solr.RubyResponseWriter]

php [class: solr.PHPResponseWriter]

phps [class: solr.PHPSerializedResponseWriter]

csv [class: solr.CSVResponseWriter]

schema.xml [class: solr.SchemaXmlResponseWriter]

By default, the following query response writers have a custom configuration:

<queryResponseWriter name="json" class="solr.JSONResponseWriter">
    <str name="content-type">text/plain; charset=UTF-8</str>
</queryResponseWriter>

<queryResponseWriter name="velocity" class="solr.VelocityResponseWriter" startup="lazy">
    <str name="template.base.dir">${velocity.template.base.dir:}</str>
    <str name="solr.resource.loader.enabled">${velocity.solr.resource.loader.enabled:true}</str>
    <str name="params.resource.loader.enabled">${velocity.params.resource.loader.enabled:false}</str>
</queryResponseWriter>

<queryResponseWriter name="xslt" class="solr.XSLTResponseWriter">
    <int name="xsltCacheLifetimeSeconds">5</int>
</queryResponseWriter>

Visit the Solr wiki page for more information: https://wiki.apache.org/solr/UpdateRequestProcessor

uuid [class: solr.UUIDUpdateProcessorFactory]

remove-blank [class: solr.RemoveBlankFieldUpdateProcessorFactory]

field-name-mutating [class: solr.FieldNameMutatingUpdateProcessorFactory]

parse-boolean [class: solr.ParseBooleanFieldUpdateProcessorFactory]

parse-long [class: solr.ParseLongFieldUpdateProcessorFactory]

parse-double [class: solr.ParseDoubleFieldUpdateProcessorFactory]

parse-date [class: solr.ParseDateFieldUpdateProcessorFactory]

add-schema-fields [class: solr.AddSchemaFieldsUpdateProcessorFactory]

<updateRequestProcessorChain name="add-unknown-fields-to-the-schema" default="${update.autoCreateFields:true}"
    processor="uuid,remove-blank,field-name-mutating,parse-boolean,parse-long,parse-double,parse-date,add-schema-fields">
    <processor class="solr.LogUpdateProcessorFactory" />
    <processor class="solr.DistributedUpdateProcessorFactory" />
    <processor class="solr.RunUpdateProcessorFactory" />
</updateRequestProcessorChain>