MarkLogic Server 11.0 Product Documentation

clang.stemmer

clang.stemmer(
   variant as String,
   [normalization as String?],
   [args as Sequence],
   [library as String]
) as element(lang.stemmer)

Summary

This function constructs a custom stemmer configuration item, suitable for use with clang.userLanguagePlugin.

Usage Notes

For a built-in stemmer, specify an empty string for the library name, or omit the library parameter and specify an empty string in clang.userLanguagePlugin.

For a user-defined plugin, the library name should be of the form plugin_path/plugin_id, such as "native/sample_plugin". If you omit this parameter, then the library value from clang.userLanguagePlugin will be used.

See Also

• clang.userLanguagePlugin
• Configuring Tokenization and Stemming Plugins in the Search Developer's Guide
• Built-in Stemmer Plugin Reference in the Search Developer's Guide
• Using a User-Defined Stemmer Plugin in the Search Developer's Guide

Example

// Create a stemmer config item for a user-defined plugin, and pass
// in a configuration option (keep-short-vowels).
'use strict';
const clang = require('/MarkLogic/custom-language');

clang.stemmer('special_stemmer', 'NFC', 
              Sequence.from(['keep-short-vowels=true']), 'native/sampleplugin');
    

Example

// Create a stemmer config item from a user-defined plugin (bitext), and
// pass in some configuration options.
'use strict';
const clang = require('/MarkLogic/custom-language');

clang:stemmer('bitext', null, 
            Sequence.from(['algorithm=german2', 'lowercase']), '')