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Equivalent to '* term* *' - in other words - a trailing wildcard on a term (but no leading wild card) and the term can appear at any position.
Algorithm:
The contains Starts With search has the following characteristics:
- This search is case in-sensitive.
- It only searches on the untokenizedLCPropertyValue and the property value.
- The literal property part of the query is boosted by 50. This gives a literal match priority.
- A trailing wild card is on the term (but no leading wild card) and the term can appear at any position.
- Lowercase and special characters removed during query parser parse.
- Parsing is done with the following analyzers:
- untokenizedLCPropertyValue - Analyzers are not applied to property value. However, the expression is lower cased (this is an explicit step done outside of Lucene
- by LexEVS code).
- literal_propertyValue - Uses our custom literal analyzer. This literal analyzer uses Lucene's WhitespaceTokenizer with Lucene's LowerCaseFilter.
Example of use:
The following examples are based on the Automobiles coding scheme.
...
Lucene query: +untokenizedLCPropertyValue:automob* literal_propertyValue:automob^50.0Complete query:
- +*:* +(entityType:concept)
- +*:* +isAnonymous:F
- +*:* +(+untokenizedLCPropertyValue:automob* literal_propertyValue:automob^50.0) +(propertyType:presentation)
Result: 1 result
- entity code: A0001
- entity description: Automobile
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Example 2:
Search string: Car (with special) charaters!
Lucene query: +untokenizedLCPropertyValue:car (with special) charaters!* ((+literal_propertyValue:car +literal_propertyValue:(with +literal_propertyValue:special) +literal_propertyValue:charaters!)^50.0)Complete query:
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:
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+
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untokenizedLCPropertyValue:car (with special) charaters!* ((+literal_propertyValue:car +literal_propertyValue:(with +literal_propertyValue:special) +literal_propertyValue:charaters!)^50.0
...
)
Result: 1 result
- entity code: C0001
- entity description: Car
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