Why Quorlen Exists

In natural language processing, we are often tasked with analyzing user communications, logs, or documents. Traditional sentiment analysis categorizes text along emotional axes:

• Sentiment Analysis answers: "How does this text feel?" (Positive, Negative, Neutral)
• Quorlen answers: "How much does this text matter?" (Significance, Importance, Impact)

These are fundamentally different questions.

A sentiment analyzer might score a tragedy and a minor daily inconvenience similarly because both contain negative words. Conversely, it might score a life-changing wedding announcement and a trivial compliment similarly because both contain positive words.

Quorlen filters out the noise. It isolates routine chatter from pivotal events, helping you focus resources on text containing high-impact milestones, crises, or material announcements.

Significance vs. Sentiment

Quorlen scores text on a scale from 0.0 (trivial/no significance) to 1.0 (critical significance). Each score is automatically classified into a Significance Tier for easy consumption. Notice how sentiment polarity does not dictate the importance score:

| Input Text | Sentiment | Score | Tier | Primary Triggers Matched | | :--- | :--- | :---: | :---: | :--- | | "I ate breakfast." | Neutral | 0.0800 | Routine | None (routine action) | | "The server returned a 500 error." | Negative | 0.1100 | Routine | None (standard log) | | "I got promoted today." | Positive | 0.3019 | Meaningful | promoted (critical milestone) | | "My father passed away." | Negative | 0.3019 | Meaningful | passed away (critical milestone) | | "We're getting married next week." | Positive | 0.3319 | Meaningful | married (critical milestone) | | "A catastrophic earthquake hit the coast, causing widespread devastation and forcing emergency evacuations." | Negative | 0.6528 | Significant | earthquake (critical), emergency (critical), catastrophic (high), devastation (high) | | ""The biopsy came back positive for malignant cancer," the doctor said. We are devastated." | Negative | 0.7107 | Critical | biopsy (critical), malignant (critical), cancer (critical), devastated (high) |

Key Features

• Zero Dependencies: Pure TypeScript implementation with zero external runtime requirements.
• Deterministic Evaluation: 100% reproducible results. No machine learning models, no network requests, and no asynchronous cold starts.
• Morphological Stemmer: A built-in morphological stemmer handles pluralizations, verb tenses, and suffix modifications dynamically (e.g., graduated and graduation map to the same root).
• Phrase and Suffix Matching: Matches complex multi-word idioms (e.g., passed away, fell in love, gave up) alongside single-word triggers.
• Amplifiers and Intensifiers: Detects superlatives, experiential structures (e.g., first ever, never felt), and exclamation marks to scale significance appropriately.
• Context-Aware Negation: Identifies negators (e.g., not, don't, never) within a three-word window and de-escalates the importance score to avoid false positives.
• Syntactic Complexity Metrics: Integrates structural features—such as lexical diversity, sentence count, proper nouns, numbers, quotes, and character length—into the final blended score.

Target Use Cases

Quorlen is built for modern developers designing content-rich applications, AI pipelines, and workflow automation:

• LLM and RAG Cost Reduction: Filter out low-significance conversational chatter, logs, or system instructions before passing text to embeddings or LLM contexts.
• Summarization & Keyphrase Extraction: Prioritize sentences containing major milestone updates or critical information before feeding text to a summarizer.
• Notification Routing: Route notifications dynamically. Bubble up messages with high significance scores (e.g., legal warnings, support issues) while silencing daily updates.
• CRM and Customer Support: Automatically flag and escalate incoming support tickets referencing high-importance events (e.g., bankruptcy, lawsuits, medical emergencies).
• Productivity & Note-Taking Applications: Extract meaningful notes, journals, or highlights automatically by scoring entry significance.

Installation

From npm (Usage)

npm install quorlen

Local Development (Contributing)

1. Clone the repository and navigate to the JavaScript ecosystem directory:

   cd javascript

2. Install the dev dependencies:

   npm install

3. Compile the TypeScript source code:

   npm run build

   Outputs standard JavaScript, source maps, and .d.ts definition files to the ./dist folder.

Quick Start

import { TextWorthinessScorer } from 'quorlen';

// Import the default English significance lexicon config
import lexiconConfig from 'quorlen/dist/dictionary.json';

// Initialize the scorer with the lexicon configuration
const scorer = new TextWorthinessScorer(lexiconConfig);

const text = "I finally graduated college today! I'm completely ecstatic, this is a legendary triumph.";
const result = scorer.score(text);

console.log(`Significance Score: ${result.score}`);  // ~0.7944
console.log(`Significance Tier: ${result.tier}`);     // "Critical"
console.log(`Lexicon Hits:`, result.hits);
console.log(`Text Word Count: ${result.meta.wordCount}`);

Significance Tiers

Every QuorlenResult includes a tier field that classifies the numerical score into a named significance tier. These tiers are calculated automatically and provide a human-readable classification that is more accurate than hardcoded thresholds:

| Tier | Score Range | Description | Example | | :--- | :---: | :--- | :--- | | Routine | 0.00 – 0.14 | Trivial daily chatter, greetings, system logs, or transactional instructions with no significance. | "I am heading out for a walk now." | | Minor | 0.15 – 0.24 | Low-importance updates with a single weak keyword hit, mild notices, or slightly notable observations. | "The database backup finished at 3am." | | Meaningful | 0.25 – 0.44 | Single clear milestone markers — career changes, personal announcements, or moderate-impact events. | "I got promoted today." | | Significant | 0.45 – 0.69 | Multi-trigger high-impact events — natural disasters, corporate crises, accidents with injuries. | "A catastrophic earthquake hit the coast, causing widespread devastation." | | Critical | 0.70 – 1.00 | Extreme emergencies containing dense critical triggers — medical diagnoses, mass disasters, terror events. | "The biopsy came back positive for malignant cancer." |

const result = scorer.score("My father passed away.");
console.log(result.tier); // "Meaningful"

if (result.tier === 'Critical' || result.tier === 'Significant') {
    // Escalate notification
}

API Reference

Quorlen exports a main scoring class and several TypeScript types/interfaces to structure inputs and outputs.

Class: TextWorthinessScorer

The main execution engine of Quorlen.

Constructor

constructor(config: LexiconConfig, options?: QuorlenOptions)

• Purpose: Creates an instance of the scoring engine loaded with a custom or default lexicon and operational options.
• Parameters:
  • config: LexiconConfig — Dictionaries containing categories, words, and weights.
  • options (Optional): QuorlenOptions — Fine-tuning settings.
• Example:

  import { TextWorthinessScorer } from 'quorlen';
  import config from 'quorlen/dist/dictionary.json';
  
  const scorer = new TextWorthinessScorer(config, { alpha: 3.0 });

Method: score

public score(text: string): QuorlenResult

• Purpose: Parses, stems, analyzes, and returns a detailed significance score for the provided string.
• Parameters:
  • text: string — The input text to score.
• Return Value: QuorlenResult — The score breakdown, hits, and text metadata.
• Example:

  const result = scorer.score("The team won the championship!");
  console.log(result.score); // e.g. 0.5421

Interfaces

LexiconConfig

Defines the dictionary config schema containing lexical categories and weights.

• Properties:
  • metadata (Optional): Metadata block defining suffix lists for stemmer, negator sets, and the alpha normalization factor.
  • categories: Key-value map grouping words and phrases under relevance weights (critical, high, medium).
  • amplifier_patterns (Optional): List of superlative and experiential strings used for score scaling.

QuorlenOptions

Fine-tuning configuration parameters.

• Properties:
  • alpha (Optional): Overrides the default mathematical constant (alpha) used in sigmoid scaling of lexicon scores. A lower alpha scales small scores up faster.

SignificanceTier

A string literal union type representing the named significance classification.

• Values: 'Routine' | 'Minor' | 'Meaningful' | 'Significant' | 'Critical'

QuorlenResult

The output returned by the score() method.

• Properties:
  • score (number): The final blended significance score [0, 1] combining lexicon matches and structural complexity.
  • tier (SignificanceTier): The named significance tier automatically calculated from the score — Routine, Minor, Meaningful, Significant, or Critical.
  • lexicon (number): The lexicon-specific sub-score [0, 1] representing matched words, phrases, and amplifiers.
  • structure (number): The structural complexity sub-score [0, 1] based on punctuation, quotes, diversity, and length metrics.
  • hits: Object categorizing matched terms into critical, high, and medium lists.
  • meta: Text-level metadata (sentence count, word count, unique words, and lexical diversity).

Technical & Performance Characteristics

Complexity & Execution Speed

Quorlen is optimized for speed and high-throughput environments:

• Time Complexity: $O(N)$ where $N$ is the number of characters. Morphological stemming and phrase matching are performed via unified regex maps and direct hash lookups, avoiding nested loops.
• Space Complexity: $O(K)$ where $K$ is the dictionary lexicon size.
• Memory Footprint: Negligible. The default configuration uses less than 300KB of RAM in execution.

Deterministic Architecture

Because Quorlen is entirely deterministic, it offers distinct advantages over LLM-based significance filters:

• Reproducibility: Identical text inputs will always result in the same numerical score down to the decimal point.
• Zero Latency Spikes: Execution is synchronous and local, typically completing in sub-millisecond durations.
• Offline Reliability: Run in browser threads, edge functions (Cloudflare Workers, Vercel Edge), or embedded microservices without internet or API key access.

Roadmap

• [ ] Support custom profiles (standard, sensitive, strict) directly within scoring options.
• [ ] Implement multi-lingual dictionaries (German, Spanish, French, and Japanese).
• [ ] Provide optional callback interfaces to register custom runtime stemmers.

License

Distributed under the MIT License. See LICENSE for more details.