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Double Metaphone Implementation Details

Search with the Lucene query syntax, using a 'sounds like' algorithm.

Algorithm:

The Double Metaphone search has the following characteristics:

• This search is case in-sensitive. 
• It searches on the double metaphone property value.   

• Parsing is done with the following analyzer:

  • dm_propertyValue - Uses our custom double metaphone analyzer.  This has the following filters:

    • LowerCaseFilter - for setting to lowercase
      
    • StopFilter - to remove stop words (the, a, etc.) from the search
      
    • DoubleMetaphoneFilter - for testing double metaphone sounds

Example of use:

The following examples are based on the Automobiles coding scheme.

Example 1:

Search string: Automobeel

Lucene query: dm_propertyValue:ATMP

Result: 1 result

• entity code: A0001
• entity description: Automobile

Example 2:
Search string: kar truk

Lucene query: +dm_propertyValue:KR +dm_propertyValue:TRK

Result: 0 results

• entity code:
• entity description:

Associated JUnits:

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