Page History
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This paragraph only apply applies to XMLUI. The JSPUI relies on the Browse Engine to show "recent submissions". This requires that the SOLR/Discovery backend is enabled (see Defining the Storage of the Browse Data). |
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This paragraph only apply applies to XMLUI. The JSPUI does not currently support "highlighting & search snippets". |
The hit highlighting configuration element contains all the settings necessary to display search snippets & enable hit highlighting.
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Changes made to the configuration will not automatically be displayed in the user interface. By default, only the following fields are displayed: dc.title, dc.contributor.author, dc.creator, dc.contributor, dc.date.issued, dc.publisher, dc.description.abstract and fulltext. If additional fields are required, look for the "itemSummaryList" template. |
Below is an example configuration of the hit highlighting.
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<property name="hitHighlightingConfiguration">
<bean class="org.dspace.discovery.configuration.DiscoveryHitHighlightingConfiguration">
<property name="metadataFields">
<list>
<bean class="org.dspace.discovery.configuration.DiscoveryHitHighlightFieldConfiguration">
<property name="field" value="dc.title"/>
<property name="snippets" value="5"/>
</bean>
<bean class="org.dspace.discovery.configuration.DiscoveryHitHighlightFieldConfiguration">
<property name="field" value="dc.contributor.author"/>
<property name="snippets" value="5"/>
</bean>
<bean class="org.dspace.discovery.configuration.DiscoveryHitHighlightFieldConfiguration">
<property name="field" value="dc.subject"/>
<property name="snippets" value="5"/>
</bean>
<bean class="org.dspace.discovery.configuration.DiscoveryHitHighlightFieldConfiguration">
<property name="field" value="dc.description.abstract"/>
<property name="maxSize" value="250"/>
<property name="snippets" value="2"/>
</bean>
<bean class="org.dspace.discovery.configuration.DiscoveryHitHighlightFieldConfiguration">
<property name="field" value="fulltext"/>
<property name="maxSize" value="250"/>
<property name="snippets" value="2"/>
</bean>
</list>
</property>
</bean>
</property> |
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The org.dspace.discovery.DiscoveryQuery object has a setter & getter for the hit highlighting configuration configured set in the discovery Discovery configuration. If this configuration is given the resolveToSolrQuery method located in the org.dspace.discovery.SolrServiceImpl class will use the standard solr Solr highlighting feature (http://wiki.apache.org/solr/HighlightingParameters). The org.dspace.discovery.DiscoverResult class has a method to set the highlighted fields for each object & field.
The rendering of search results is no longer handled by the mets METS format but uses a special type of list named "TYPE_DSO_LIST". Each metadata field (& fulltext if configured) is added in the DRI and IF the field contains hit higlighting the java Java code will split up the string & add DRI highlights to the list. The xsl XSL for the themes also contains special rendering xsl XSL for the DRI, ; for Mirage, the changes have been are located in the discovery.xsl file. For themes using the old themes based on structural.xsl, look for the template matching "dri:list[@type='dsolist']".
"More like this" configuration
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The 'more like this'-configuration element contains all the settings for displaying the related items on an item display page.
Below is an example of the "more like this" configuration.
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<property name="moreLikeThisConfiguration">
<bean class="org.dspace.discovery.configuration.DiscoveryMoreLikeThisConfiguration">
<property name="similarityMetadataFields">
<list>
<value>dc.contributor.author</value>
<value>dc.creator</value>
<value>dc.subject</value>
</list>
</property>
<!--The minimum number of matching terms accross the metadata fields above before an item is found as related -->
<property name="minTermFrequency" value="5"/>
<!--The maximum number of related items displayed-->
<property name="max" value="3"/>
</bean>
</property> |
The property name & the bean class are mandatory. The property field names are discusses discussed below.
- similarityMetadataFields: the metadata fields checked for similarity
- minTermFrequency: The minimum number of matching terms accross the metadata fields above before an item is found as related
- max: The maximum number of related items displayed
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[dspace]/bin/dspace update-discovery-index -o
Advanced
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Solr Configuration
Discovery is built as an application layer on top of the Open Source Enterprise Search Server SOLRSolr. ThereforTherefore, SOLR configuration Solr configuration can be applied to the SOLR cores Solr cores that are shipped with DSpace.
The DSpace SOLR Solr instance itself now runs two cores. One for collection DSpace Solr based "statistics", the other for Discovery Solr based "search".
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Overview
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