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• This search is case in-sensitive. 
• Only searches on the property value and literal property value.
  
• The literal property part of the query is boosted by 50.  This gives a literal match priority.
• Performs a wildcardQuery
• Lowercase and special characters removed during query parser parse.

• Parsing is done with the following analyzers:

  • propertyValue - Uses our custom standard analyzer that has no stop words.

  • literal_propertyValue - Uses our custom literal analyzer.  This literal analyzer uses Lucene's WhitspaceTokenizer with Lucene's

  StandardAnalyzer

  • LowerCaseFilter.

   

Example of use:

The following examples are based on the Automobiles coding scheme.

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• entity code: NoRelationsConcept
• entity description: A concept for testing Graph Building on Concepts with no relations

Example 3:
Search string: ncept for testing graph

Lucene query: +spanNear([mask(spanWildcardQuery(reverse_propertyValue:tpecn*)) as propertyValue, mask(propertyValue:for) as propertyValue, mask(propertyValue:testing) as propertyValue, mask(spanWildcardQuery(propertyValue:graph*)) as propertyValue], 0, true) ((+literal_propertyValue:ncept +literal_propertyValue:for +literal_propertyValue:testing +literal_propertyValue:graph)^50.0)

Complete query:

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mask(propertyValue:

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testing) as propertyValue, mask(spanWildcardQuery(propertyValue:graph*)) as propertyValue], 0, true) ((+literal_propertyValue:ncept +literal_propertyValue:for +literal_propertyValue:testing +literal_propertyValue:graph)^50.0

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)

Result: 1 result

• entity code: NoRelationsConcept
• entity description: A concept for testing Graph Building on Concepts with no relations

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Junit tests can be found here: https://github.com/lexevs/lexevs/blob/master/lbTest/src/test/java/org/LexGrid/LexBIG/Impl/function/query/lucene/searchAlgorithms/TestSubString.java