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The "SchemaXml" page has been changed by FredrikRodland: http://wiki.apache.org/solr/SchemaXml?action=diff&rev1=67&rev2=68 === Recommended fields === While these fields aren't strictly mandatory (Solr will run if you remove them fully), Bad Things happen in some situations if they aren't defined. We recommend that you leave these fields alone. If you don't use them, there's no appreciable penalty. * id - Almost all Solr installations have this field defined as the <uniqueKey> (see below). - * _version_ <!> [[Solr4]] - This field is used for optimistic locking in [[http://wiki.apache.org/solr/SolrCloud|SolrCloud]] and it enables [[http://wiki.apache.org/solr/RealTimeGet|Real Time Get]]. If you remove it you must also remove the transaction logging from solrconfig.xml, see [[http://wiki.apache.org/solr/RealTimeGet|Real Time Get]]. + * _version_ <!> [[Solr4.0]] - This field is used for optimistic locking in [[http://wiki.apache.org/solr/SolrCloud|SolrCloud]] and it enables [[http://wiki.apache.org/solr/RealTimeGet|Real Time Get]]. If you remove it you must also remove the transaction logging from solrconfig.xml, see [[http://wiki.apache.org/solr/RealTimeGet|Real Time Get]]. === Common field options === Common options that fields can have are... @@ -69, +69 @@ * To use interactively, requires [[TermVectorComponent]] * Corresponds to TV button in Luke, and V field attribute. * `omitTermFreqAndPositions=true|false` <!> [[Solr1.4]] - * If set, omit term freq, positions and [[Payloads|payloads]] from postings for this field. This can be a performance boost for fields that don't require that information and reduces storage space required for the index. Queries that rely on position that are issued on a field with this option will silently fail to find documents. + * If set, omit term freq, positions and [[Payloads|payloads]] from postings for this field. This can be a performance boost for fields that don't require that information and reduces storage space required for the index. Queries that rely on position that are issued on a field with this option fail with an exception. Prior to <!> [[Solr4.0]] the queries would silently fail to find documents. + * `omitPositions=true|false` <!> [[Solr3.4]] * If set, omits positions, but keeps term frequencies
