EnglishAnalyzer

Optimized analyzer for English text with stemming and stop word filtering.

Import

import EnglishAnalyzer from 'dynamosearch/analyzers/EnglishAnalyzer';

Constructor

new EnglishAnalyzer(options?: EnglishAnalyzerOptions)

Parameters

• stopWords ('_english_' | '_none_' | string[], optional) - Stop words to filter (default: '_english_')
• stemmer ('porter' | 'english' | 'none', optional) - Stemming algorithm to use (default: 'porter')

Pipeline

• CharFilters: None
• Tokenizer: StandardTokenizer
• Filters: LowerCaseFilter, StopFilter, EnglishPossessiveFilter, PorterStemFilter (or SnowballFilter with English)

Example

const analyzer = new EnglishAnalyzer();
const tokens = await analyzer.analyze('The running foxes');
// [
//   { token: 'run', startOffset: 4, endOffset: 11, position: 1 },
//   { token: 'fox', startOffset: 12, endOffset: 17, position: 2 }
// ]

Behavior

• Removes English possessives ("'s")
• Converts to lowercase
• Removes English stop words
• Applies stemming to reduce words to root form
• Handles word variants (run, runs, running → run)

Stemming Options

Porter Stemmer (Default)

const analyzer = new EnglishAnalyzer({ stemmer: 'porter' });

Snowball English Stemmer

const analyzer = new EnglishAnalyzer({ stemmer: 'english' });

No Stemming

const analyzer = new EnglishAnalyzer({ stemmer: 'none' });

Best For

• English text search with stemming
• Handling English word variations (run, runs, running)
• Removing English stop words
• Improving search recall for English content

See Also

• StandardAnalyzer - For English without stemming
• StopAnalyzer - For letter-based with stop words
• FrenchAnalyzer - For French text
• SpanishAnalyzer - For Spanish text