Isidore: A grammar utility for the internet

An experimental, potentially multilingual, highly configurable part-of-speech tagger.

This is still somewhat experimental.. Verb identification, in particular, is still limited. Please monitor the issuer tracker for progress on feature development.

API

PartsOfSpeech

There is a class per part of speech. All parts of speech inherit from the word class:

Word Class

| Member | Type | Description | |-------| -----| -------------| | partOfSpeech | string | one of the eight parts of speech| | word | string | the word (token) | | type | string | a high-level classification for this partOfSpeech | | types | array | all possible types for this partOfSpeech |

Parts of Speech:

• Noun
• Pronoun
• Verb
• Adjective
• Adverb
• Conjunction
• Interjection
• Preposition

These may all have additional members.

Dictionaries

There is a dictionary class per part-of-speech. All dictionaries inherit from the Dictionary class. Any rules about how words can vary (inflections) are stored in the Dictionary for that part of speech (e.g. NounDictionary has rules about how to recognize plurals and possessives);

This is so that Isidore could have potential to scale into other languages without requiring massive rewrites.

Dictionary

| Member | Type | Description | |-------| -----| -------------| | list | array | sorted list of words | | language | string | Language for the dictionary | | findWord() | method | finds a word in the dictionary | | partOfSpeech | string | the part of speech that dictionary has | | GrammarModel | class | The type that the dictionary contains |

NounDictionary class:

| Member | Type | Description | |-------| -----| -------------| | list| array | Nouns with types and wordCategories| | language | string | two-letter abbreviation of language| | inflections | object | inflections that can be applied to all nouns | | findWord(word) | method | Searches for word in dictionary (returns Noun if successful) | | getInflections(word) | method | word (string), returns all possible inflections for the word | | guessInflection(word) | method | (string), returns a single inflection (object) | | removeInflection(word, inflection) | method | word(string), inflection (object). returns string |

Languages

All languages within the utility. Right now we just have En, which is a Language;

Language class

| Member | Type | Description | |-------| -----| -------------| |grammarDictionaries | Object | NounDictionary, PronounDictionary, VerbDictionary, AdjectiveDictionary, AdverbDictionary, ConjunctionDictionary, InterjectionDictionary, PrepositionDictionary | language | string | two-letter description of language| | findWord() | method | accepts a string, returns an array containing partOfSpeech or a word if no word is found

Sentence

The sentence is where the parsing magic starts.

Sentence Class

| Member | Type | Description | |-------| -----| -------------| | text| string | raw text of the sentence | |type | string | declarative, interrogative, imperative, exclamatory| | language | string | Language (En) is default| | rawWordList| array | only the words in the sentence | | wordList| array | each word in the sentence classified as either a or word | | types | array | the possible types that a sentence could have | | getSentenceType() | method | returns string, the type of sentence. Guesses what the sentence type is based on punctuation |

Example

const { Sentence } = isidore
const mySentence = new Sentence('He gives her a car.');
const { wordList } = mySentence;

console.log(mySentence);
/*
Sentence {
    text: 'He gives him a car.',
    language: 'En',
    rawWordList: [ 'he', 'gives', 'him', 'a', 'car' ],
    wordList:
    [
        Pronoun {
            partOfSpeech: 'pronoun',
            word: 'he',
            referent: 'animate',
            gender: 'masculine',
            type: 'subject',
            person: 3,
            quantity: 'singular'
        },
        Verb {
            partOfSpeech: 'verb',
            word: 'give',
            type: 'transitive',
            valence: 2
        },
        Pronoun {
            partOfSpeech: 'pronoun',
            word: 'him',
            referent: 'animate',
            gender: 'masculine',
            type: 'object',
            person: 3,
            quantity: 'singular',
        },
        Adjective {
            partOfSpeech: 'adjective',
            word: 'a',
            type: 'article',
            degree: undefined
        },
        Noun {
            partOfSpeech: 'noun',
            word: 'car',
            type: 'entityClass',
            subType: 'common',
            inflection: undefined
        }
    ],
    type: 'declarative'
}
    */