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# SurfacePatternsFile

The path to the Passage Extractor surface patterns file. This parameter applies only when Type is set to `PassageExtractor`.

Passage Extractor uses surface patterns to find the possible forms that an answer to a particular question might take. It attempts to match candidate answers against the surface patterns to find the best match.

If you move or rename the surface patterns JSON file, set `SurfacePatternsFile` to the new name and location.

Type: | String
Default: |
Required: | No
Configuration Section: | MySystem
Example: | `SurfacePatternsFile=./passageextractor/configuration/surface_patterns_en.json`
See Also: |

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Version 25.4 | Last updated October 2025

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Product: Knowledge Discovery Answer Server 25.4

Topic Title: SurfacePatternsFile