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Comment: Documentation for "Did you mean" spellcheck

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  • Auto-complete functionality has been removed in XMLUI from search queries due to performance issues. JSPUI still supports auto-complete functionality without performance issues.

DSpace 4.0 

Info
Starting from DSpace 4.0, Discovery is the default search and browse solution for DSpace.

General improvements:

  • Browse is now also based on the Discovery index, rather than the legacy Lucene index.

XMLUI-only:

  • "Did you means" spell check aid for search

Enabling Discovery

Because Discovery was adopted as the default infrastructure for search and browse in DSpace 4, no manual steps are required to enable Discovery. If you want to enable Discovery on older versions of DSpace, please refer to the DSpace documentation for that particular version.

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The org.dspace.discovery.SearchService object has received a getRelatedItems() method. This method requires an item & the more-like-this configuration bean from above. This method is implemented in the org.dspace.discovery.SolrServiceImpl which uses the item as a query & uses the default Solr parameters for more-like-this to pass the bean configuration to solr (https://cwiki.apache.org/confluence/display/solr/MoreLikeThis). The result will be a list of items or if none found an empty list. The rendering of this list is handled in the org.dspace.app.xmlui.aspect.discovery.RelatedItems class.

"Did you mean" spellcheck aid for search configuration

DSpace 4 introduces the use of SOLR's SpellCheckComponent as an aid for search. When a user's search does not return any hits, the user is presented with a suggestion for an alternative search query. The feature currently only one line of configuration to discovery.xml. Changing the value from true to false will disable the feature. 

Code Block
languagehtml/xml
<property name="spellCheckEnabled" value="true" />
"Did you mean" spellcheck aid for search technical details

Similar to the More like this configuration, SOLR's spell check component is used with default configuration values. Any of these values can be overridden in the solrconfig.xml file located in dspace/solr/search/conf/. Following links provide more information about the SOLR SpellCheckComponent:

http://wiki.apache.org/solr/SpellCheckComponent

https://cwiki.apache.org/confluence/display/solr/Spell+Checking

Discovery Solr Index Maintenance

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