Awesome

 <i>↬_ᔐᖜ<b>↬</b></i>    and how hard it is to actually <b>parse</b> and <i>use</i>?

import nlp from 'compromise'

let doc = nlp('she sells seashells by the seashore.')
doc.verbs().toPastTense()
doc.text()
// 'she sold seashells by the seashore.'

if (doc.has('simon says #Verb')) {
  return true
}

let doc = nlp(entireNovel)
doc.match('the #Adjective of times').text()
// "the blurst of times?"

<i>and get data:</i>

import plg from 'compromise-speech'
nlp.extend(plg)

let doc = nlp('Milwaukee has certainly had its share of visitors..')
doc.compute('syllables')
doc.places().json()
/*
[{
  "text": "Milwaukee",
  "terms": [{
    "normal": "milwaukee",
    "syllables": ["mil", "wau", "kee"]
  }]
}]
*/

avoid the problems of brittle parsers:

let doc = nlp("we're not gonna take it..")

doc.has('gonna') // true
doc.has('going to') // true (implicit)

// transform
doc.contractions().expand()
doc.text()
// 'we are not going to take it..'

and whip stuff around like it's data:

let doc = nlp('ninety five thousand and fifty two')
doc.numbers().add(20)
doc.text()
// 'ninety five thousand and seventy two'

_{-because it actually is-}

let doc = nlp('the purple dinosaur')
doc.nouns().toPlural()
doc.text()
// 'the purple dinosaurs'

Use it on the client-side:

<script src="https://unpkg.com/compromise"></script>
<script>
  var doc = nlp('two bottles of beer')
  doc.numbers().minus(1)
  document.body.innerHTML = doc.text()
  // 'one bottle of beer'
</script>

or likewise:

import nlp from 'compromise'

var doc = nlp('London is calling')
doc.verbs().toNegative()
// 'London is not calling'

compromise is ~250kb (minified):

it's pretty fast. It can run on keypress:

it works mainly by <a href="https://observablehq.com/@spencermountain/verbs">conjugating all forms</a> of a basic word list.

The final lexicon is <a href="https://observablehq.com/@spencermountain/compromise-lexicon">~14,000 words</a>:

you can read more about how it works, here. it's weird.

import nlp from 'compromise/one'

let doc = nlp("Wayne's World, party time")
let data = doc.json()
/* [{
  normal:"wayne's world party time",
    terms:[{ text: "Wayne's", normal: "wayne" },
      ...
      ]
  }]
*/

<b>compromise/one</b> splits your text up, wraps it in a handy API,

<b>/one</b> is quick - most sentences take a 10th of a millisecond.

It can do <b>~1mb</b> of text a second - or 10 wikipedia pages.

<i>Infinite jest</i> takes 3s.

import nlp from 'compromise/two'

let doc = nlp("Wayne's World, party time")
let str = doc.match('#Possessive #Noun').text()
// "Wayne's World"

_{this is more useful than people sometimes realize.}

Light grammar helps you write cleaner templates, and get closer to the information.

compromise has <b>83 tags</b>, arranged in <a href="https://observablehq.com/@spencermountain/compromise-tags">a handsome graph</a>.

<b>#FirstName</b> → <b>#Person</b> → <b>#ProperNoun</b> → <b>#Noun</b>

you can see the grammar of each word by running doc.debug()

you can see the reasoning for each tag with nlp.verbose('tagger').

if you prefer <a href="https://www.ling.upenn.edu/courses/Fall_2003/ling001/penn_treebank_pos.html"><i>Penn tags</i></a>, you can derive them with:

let doc = nlp('welcome thrillho')
doc.compute('penn')
doc.json()

import nlp from 'compromise/three'

let doc = nlp("Wayne's World, party time")
let str = doc.people().normalize().text()
// "wayne"

<b>compromise/three</b> is a set of tooling to <i>zoom into</i> and operate on parts of a text.

.numbers() grabs all the numbers in a document, for example - and extends it with new methods, like .subtract().

When you have a phrase, or group of words, you can see additional metadata about it with .json()

let doc = nlp('four out of five dentists')
console.log(doc.fractions().json())
/*[{
    text: 'four out of five',
    terms: [ [Object], [Object], [Object], [Object] ],
    fraction: { numerator: 4, denominator: 5, decimal: 0.8 }
  }
]*/

let doc = nlp('$4.09CAD')
doc.money().json()
/*[{
    text: '$4.09CAD',
    terms: [ [Object] ],
    number: { prefix: '$', num: 4.09, suffix: 'cad'}
  }
]*/

API

Compromise/one

Output

• .text() - return the document as text
• .json() - return the document as data
• .debug() - pretty-print the interpreted document
• .out() - a named or custom output
• .html({}) - output custom html tags for matches
• .wrap({}) - produce custom output for document matches

Utils

• .found [getter] - is this document empty?
• .docs [getter] get term objects as json
• .length [getter] - count the # of characters in the document (string length)
• .isView [getter] - identify a compromise object
• .compute() - run a named analysis on the document
• .clone() - deep-copy the document, so that no references remain
• .termList() - return a flat list of all Term objects in match
• .cache({}) - freeze the current state of the document, for speed-purposes
• .uncache() - un-freezes the current state of the document, so it may be transformed
• .freeze({}) - prevent any tags from being removed, in these terms
• .unfreeze({}) - allow tags to change again, as default

Accessors

• .all() - return the whole original document ('zoom out')
• .terms() - split-up results by each individual term
• .first(n) - use only the first result(s)
• .last(n) - use only the last result(s)
• .slice(n,n) - grab a subset of the results
• .eq(n) - use only the nth result
• .firstTerms() - get the first word in each match
• .lastTerms() - get the end word in each match
• .fullSentences() - get the whole sentence for each match
• .groups() - grab any named capture-groups from a match
• .wordCount() - count the # of terms in the document
• .confidence() - an average score for pos tag interpretations

Match

(match methods use the match-syntax.)

• .match('') - return a new Doc, with this one as a parent
• .not('') - return all results except for this
• .matchOne('') - return only the first match
• .if('') - return each current phrase, only if it contains this match ('only')
• .ifNo('') - Filter-out any current phrases that have this match ('notIf')
• .has('') - Return a boolean if this match exists
• .before('') - return all terms before a match, in each phrase
• .after('') - return all terms after a match, in each phrase
• .union() - return combined matches without duplicates
• .intersection() - return only duplicate matches
• .complement() - get everything not in another match
• .settle() - remove overlaps from matches
• .growRight('') - add any matching terms immediately after each match
• .growLeft('') - add any matching terms immediately before each match
• .grow('') - add any matching terms before or after each match
• .sweep(net) - apply a series of match objects to the document
• .splitOn('') - return a Document with three parts for every match ('splitOn')
• .splitBefore('') - partition a phrase before each matching segment
• .splitAfter('') - partition a phrase after each matching segment
• .join() - merge any neighbouring terms in each match
• .joinIf(leftMatch, rightMatch) - merge any neighbouring terms under given conditions
• .lookup([]) - quick find for an array of string matches
• .autoFill() - create type-ahead assumptions on the document

Tag

• .tag('') - Give all terms the given tag
• .tagSafe('') - Only apply tag to terms if it is consistent with current tags
• .unTag('') - Remove this term from the given terms
• .canBe('') - return only the terms that can be this tag

Case

• .toLowerCase() - turn every letter of every term to lower-cse
• .toUpperCase() - turn every letter of every term to upper case
• .toTitleCase() - upper-case the first letter of each term
• .toCamelCase() - remove whitespace and title-case each term

Whitespace

• .pre('') - add this punctuation or whitespace before each match
• .post('') - add this punctuation or whitespace after each match
• .trim() - remove start and end whitespace
• .hyphenate() - connect words with hyphen, and remove whitespace
• .dehyphenate() - remove hyphens between words, and set whitespace
• .toQuotations() - add quotation marks around these matches
• .toParentheses() - add brackets around these matches

Loops

• .map(fn) - run each phrase through a function, and create a new document
• .forEach(fn) - run a function on each phrase, as an individual document
• .filter(fn) - return only the phrases that return true
• .find(fn) - return a document with only the first phrase that matches
• .some(fn) - return true or false if there is one matching phrase
• .random(fn) - sample a subset of the results

Insert

• .replace(match, replace) - search and replace match with new content
• .replaceWith(replace) - substitute-in new text
• .remove() - fully remove these terms from the document
• .insertBefore(str) - add these new terms to the front of each match (prepend)
• .insertAfter(str) - add these new terms to the end of each match (append)
• .concat() - add these new things to the end
• .swap(fromLemma, toLemma) - smart replace of root-words,using proper conjugation

Transform

• .sort('method') - re-arrange the order of the matches (in place)
• .reverse() - reverse the order of the matches, but not the words
• .normalize({}) - clean-up the text in various ways
• .unique() - remove any duplicate matches

Lib

(these methods are on the main nlp object)

• nlp.tokenize(str) - parse text without running POS-tagging

• nlp.lazy(str, match) - scan through a text with minimal analysis

• nlp.plugin({}) - mix in a compromise-plugin

• nlp.parseMatch(str) - pre-parse any match statements into json

• nlp.world() - grab or change library internals

• nlp.model() - grab all current linguistic data

• nlp.methods() - grab or change internal methods

• nlp.hooks() - see which compute methods run automatically

• nlp.verbose(mode) - log our decision-making for debugging

• nlp.version - current semver version of the library

• nlp.addWords(obj, isFrozen?) - add new words to the lexicon

• nlp.addTags(obj) - add new tags to the tagSet

• nlp.typeahead(arr) - add words to the auto-fill dictionary

• nlp.buildTrie(arr) - compile a list of words into a fast lookup form

• nlp.buildNet(arr) - compile a list of matches into a fast match form

compromise/two:

Contractions

• .contractions() - things like "didn't"
• .contractions().expand() - things like "didn't"
• .contract() - things like "didn't"

compromise/three:

Nouns

• .nouns() - return any subsequent terms tagged as a Noun
  • .nouns().json() - overloaded output with noun metadata
  • .nouns().parse() - get tokenized noun-phrase
  • .nouns().isPlural() - return only plural nouns
  • .nouns().isSingular() - return only singular nouns
  • .nouns().toPlural() - 'football captain' → 'football captains'
  • .nouns().toSingular() - 'turnovers' → 'turnover'
  • .nouns().adjectives() - get any adjectives describing this noun

Verbs

• .verbs() - return any subsequent terms tagged as a Verb
  • .verbs().json() - overloaded output with verb metadata
  • .verbs().parse() - get tokenized verb-phrase
  • .verbs().subjects() - what is doing the verb action
  • .verbs().adverbs() - return the adverbs describing this verb.
  • .verbs().isSingular() - return singular verbs like 'spencer walks'
  • .verbs().isPlural() - return plural verbs like 'we walk'
  • .verbs().isImperative() - only instruction verbs like 'eat it!'
  • .verbs().toPastTense() - 'will go' → 'went'
  • .verbs().toPresentTense() - 'walked' → 'walks'
  • .verbs().toFutureTense() - 'walked' → 'will walk'
  • .verbs().toInfinitive() - 'walks' → 'walk'
  • .verbs().toGerund() - 'walks' → 'walking'
  • .verbs().toPastParticiple() - 'drive' → 'had driven'
  • .verbs().conjugate() - return all conjugations of these verbs
  • .verbs().isNegative() - return verbs with 'not', 'never' or 'no'
  • .verbs().isPositive() - only verbs without 'not', 'never' or 'no'
  • .verbs().toNegative() - 'went' → 'did not go'
  • .verbs().toPositive() - "didn't study" → 'studied'

Numbers

• .numbers() - grab all written and numeric values
  • .numbers().parse() - get tokenized number phrase
  • .numbers().get() - get a simple javascript number
  • .numbers().json() - overloaded output with number metadata
  • .numbers().toNumber() - convert 'five' to 5
  • .numbers().toLocaleString() - add commas, or nicer formatting for numbers
  • .numbers().toText() - convert '5' to five
  • .numbers().toOrdinal() - convert 'five' to fifth or 5th
  • .numbers().toCardinal() - convert 'fifth' to five or 5
  • .numbers().isOrdinal() - return only ordinal numbers
  • .numbers().isCardinal() - return only cardinal numbers
  • .numbers().isEqual(n) - return numbers with this value
  • .numbers().greaterThan(min) - return numbers bigger than n
  • .numbers().lessThan(max) - return numbers smaller than n
  • .numbers().between(min, max) - return numbers between min and max
  • .numbers().isUnit(unit) - return only numbers in the given unit, like 'km'
  • .numbers().set(n) - set number to n
  • .numbers().add(n) - increase number by n
  • .numbers().subtract(n) - decrease number by n
  • .numbers().increment() - increase number by 1
  • .numbers().decrement() - decrease number by 1
• .money() - things like '$2.50'
  • .money().get() - retrieve the parsed amount(s) of money
  • .money().json() - currency + number info
  • .money().currency() - which currency the money is in
• .fractions() - like '2/3rds' or 'one out of five'
  • .fractions().parse() - get tokenized fraction
  • .fractions().get() - simple numerator, denomenator data
  • .fractions().json() - json method overloaded with fractions data
  • .fractions().toDecimal() - '2/3' -> '0.66'
  • .fractions().normalize() - 'four out of 10' -> '4/10'
  • .fractions().toText() - '4/10' -> 'four tenths'
  • .fractions().toPercentage() - '4/10' -> '40%'
• .percentages() - like '2.5%'
  • .percentages().get() - return the percentage number / 100
  • .percentages().json() - json overloaded with percentage information
  • .percentages().toFraction() - '80%' -> '8/10'

Sentences

• .sentences() - return a sentence class with additional methods
  • .sentences().json() - overloaded output with sentence metadata
  <!-- - **[.sentences().subjects()](https://observablehq.com/@spencermountain/compromise-sentences)** - return the main noun of each sentence -->
  • .sentences().toPastTense() - he walks -> he walked
  • .sentences().toPresentTense() - he walked -> he walks
  • .sentences().toFutureTense() -- he walks -> he will walk
  • .sentences().toInfinitive() -- verb root-form he walks -> he walk
  • .sentences().toNegative() - - he walks -> he didn't walk
  • .sentences().isQuestion() - return questions with a ?
  • .sentences().isExclamation() - return sentences with a !
  • .sentences().isStatement() - return sentences without ? or !

Adjectives

• .adjectives() - things like 'quick'
  • .adjectives().json() - get adjective metadata
  • .adjectives().conjugate() - return all inflections of these adjectives
  • .adjectives().adverbs() - get adverbs describing this adjective
  • .adjectives().toComparative() - 'quick' -> 'quicker'
  • .adjectives().toSuperlative() - 'quick' -> 'quickest'
  • .adjectives().toAdverb() - 'quick' -> 'quickly'
  • .adjectives().toNoun() - 'quick' -> 'quickness'

Misc selections

• .clauses() - split-up sentences into multi-term phrases
• .chunks() - split-up sentences noun-phrases and verb-phrases
• .hyphenated() - all terms connected with a hyphen or dash like 'wash-out'
• .phoneNumbers() - things like '(939) 555-0113'
• .hashTags() - things like '#nlp'
• .emails() - things like 'hi@compromise.cool'
• .emoticons() - things like :)
• .emojis() - things like 💋
• .atMentions() - things like '@nlp_compromise'
• .urls() - things like 'compromise.cool'
• .pronouns() - things like 'he'
• .conjunctions() - things like 'but'
• .prepositions() - things like 'of'
• .abbreviations() - things like 'Mrs.'
• .people() - names like 'John F. Kennedy'
  • .people().json() - get person-name metadata
  • .people().parse() - get person-name interpretation
• .places() - like 'Paris, France'
• .organizations() - like 'Google, Inc'
• .topics() - people() + places() + organizations()
• .adverbs() - things like 'quickly'
  • .adverbs().json() - get adverb metadata
• .acronyms() - things like 'FBI'
  • .acronyms().strip() - remove periods from acronyms
  • .acronyms().addPeriods() - add periods to acronyms
• .parentheses() - return anything inside (parentheses)
  • .parentheses().strip() - remove brackets
• .possessives() - things like "Spencer's"
  • .possessives().strip() - "Spencer's" -> "Spencer"
• .quotations() - return any terms inside paired quotation marks
  • .quotations().strip() - remove quotation marks
• .slashes() - return any terms grouped by slashes
  • .slashes().split() - turn 'love/hate' into 'love hate'

.extend():

This library comes with a considerate, common-sense baseline for english grammar.

You're free to change, or lay-waste to any settings - which is the fun part actually.

the easiest part is just to suggest tags for any given words:

let myWords = {
  kermit: 'FirstName',
  fozzie: 'FirstName',
}
let doc = nlp(muppetText, myWords)

or make heavier changes with a compromise-plugin.

import nlp from 'compromise'
nlp.extend({
  // add new tags
  tags: {
    Character: {
      isA: 'Person',
      notA: 'Adjective',
    },
  },
  // add or change words in the lexicon
  words: {
    kermit: 'Character',
    gonzo: 'Character',
  },
  // change inflections
  irregulars: {
    get: {
      pastTense: 'gotten',
      gerund: 'gettin',
    },
  },
  // add new methods to compromise
  api: View => {
    View.prototype.kermitVoice = function () {
      this.sentences().prepend('well,')
      this.match('i [(am|was)]').prepend('um,')
      return this
    }
  },
})

Docs:

gentle introduction:

• #1) Input → output
• #2) Match & transform
• #3) Making a chat-bot <!-- * **[Tutorial #4]()** - Making a plugin -->

Documentation:

Talks:

• Language as an Interface - by Spencer Kelly
• Coding Chat Bots - by KahWee Teng
• On Typing and data - by Spencer Kelly

Articles:

• Geocoding Social Conversations with NLP and JavaScript - by Microsoft
• Microservice Recipe - by Eventn
• Adventure Game Sentence Parsing with Compromise
• Building Text-Based Games - by Matt Eland
• Fun with javascript in BigQuery - by Felipe Hoffa
• Natural Language Processing... in the Browser? - by Charles Landau

Some fun Applications:

• Automated Bechdel Test - by The Guardian
• Story generation framework - by Jose Phrocca
• Tumbler blog of lists - horse-ebooks-like lists - by Michael Paulukonis
• Video Editing from Transcription - by New Theory
• Browser extension Fact-checking - by Alexander Kidd
• Siri shortcut - by Michael Byrns
• Amazon skill - by Tajddin Maghni
• Tasking Slack-bot - by Kevin Suh [see more]

Comparisons

• Compromise and Spacy
• Compromise and NLTK

Plugins:

These are some helpful extensions:

Dates

npm install compromise-dates

• .dates() - find dates like June 8th or 03/03/18
  • .dates().get() - simple start/end json result
  • .dates().json() - overloaded output with date metadata
  • .dates().format('') - convert the dates to specific formats
  • .dates().toShortForm() - convert 'Wednesday' to 'Wed', etc
  • .dates().toLongForm() - convert 'Feb' to 'February', etc
• .durations() - 2 weeks or 5mins
  • .durations().get() - return simple json for duration
  • .durations().json() - overloaded output with duration metadata
• .times() - 4:30pm or half past five
  • .times().get() - return simple json for times
  • .times().json() - overloaded output with time metadata

Stats

npm install compromise-stats

• .tfidf({}) - rank words by frequency and uniqueness

• .ngrams({}) - list all repeating sub-phrases, by word-count

• .unigrams() - n-grams with one word

• .bigrams() - n-grams with two words

• .trigrams() - n-grams with three words

• .startgrams() - n-grams including the first term of a phrase

• .endgrams() - n-grams including the last term of a phrase

• .edgegrams() - n-grams including the first or last term of a phrase

Speech

npm install compromise-syllables

• .syllables() - split each term by its typical pronunciation
• .soundsLike() - produce a estimated pronunciation

Wikipedia

npm install compromise-wikipedia

• .wikipedia() - compressed article reconciliation

Typescript

we're committed to typescript/deno support, both in main and in the official-plugins:

import nlp from 'compromise'
import stats from 'compromise-stats'

const nlpEx = nlp.extend(stats)

nlpEx('This is type safe!').ngrams({ min: 1 })

Limitations:

• slash-support: We currently split slashes up as different words, like we do for hyphens. so things like this don't work: <code>nlp('the koala eats/shoots/leaves').has('koala leaves') //false</code>

• inter-sentence match: By default, sentences are the top-level abstraction. Inter-sentence, or multi-sentence matches aren't supported without <a href="https://github.com/spencermountain/compromise/tree/master/plugins/paragraphs">a plugin</a>: <code>nlp("that's it. Back to Winnipeg!").has('it back')//false</code>

• nested match syntax: the <s>danger</s> beauty of regex is that you can recurse indefinitely. Our match syntax is much weaker. Things like this are not <i>(yet)</i> possible: <code>doc.match('(modern (major|minor))? general')</code> complex matches must be achieved with successive .match() statements.

• dependency parsing: Proper sentence transformation requires understanding the syntax tree of a sentence, which we don't currently do. We should! Help wanted with this.

FAQ

See Also:

•   en-pos - very clever javascript pos-tagger by Alex Corvi

•   naturalNode - fancier statistical nlp in javascript

•   winkJS - POS-tagger, tokenizer, machine-learning in javascript

•   dariusk/pos-js - fastTag fork in javascript

•   compendium-js - POS and sentiment analysis in javascript

•   nodeBox linguistics - conjugation, inflection in javascript

•   reText - very impressive text utilities in javascript

•   superScript - conversation engine in js

•   jsPos - javascript build of the time-tested Brill-tagger

•   spaCy - speedy, multilingual tagger in C/python

•   Prose - quick tagger in Go by Joseph Kato

•   TextBlob - python tagger

<b>MIT</b>