Extract lemmatized nonstop words

Extracts a pure list of lemmatized words of a text filtered by stop words.

Features

• Removing stopwords.
• Removing proper noun.
• Regular past tense verb and past participle verb to present form: created to create
• Present form (3rd person) to present form: creates to create
• Plural noun to singular: cats to cat
• Gerund form verb to present form: creating to create

Install

install using Yarn:

yarn add extract-lemmatized-nonstop-words

install using NPM:

npm i --save extract-lemmatized-nonstop-words

Usage

const extract = require('extract-lemmatized-nonstop-words');

const words = extract('He created these categories and they are better.');

returns:

Array (3 items)
    0: Object
        lemma: "create"
        normal: "created"
        pos: "VBD"
        tag: "word"
        value: "created"
        vocabulary: "create"
    1: Object
        lemma: "category"
        normal: "categories"
        pos: "NNS"
        tag: "word"
        value: "categories"
        vocabulary: "category"
    2: Object
        lemma: "good"
        normal: "better"
        pos: "JJR"
        tag: "word"
        value: "better"
        vocabulary: "better"

API

extract(text, filter) ⇒ Array.<Object>

Extracts a pure list of lemmatized words of a text filtered by stop words. it will remove non-word tokens, ones which their length is less than 3 and contains non-alphabetic charachters.

Param	Type	Description
text	String	input text
filter	Array.<String>	list of custom stopword which will replace with defaults, in case of passing false filtering results by stopwords will ignore.

Annotation Specification

Annotation	Name	Example
NN	Noun	dog man
NNS	Plural noun	dogs men
NNP	Proper noun	London Alex
NNPS	Plural proper noun	Smiths
VB	Base form verb	be
VBP	Present form verb	throw
VBZ	Present form (3rd person)	throws
VBG	Gerund form verb	throwing
VBD	Past tense verb	threw
VBN	Past participle verb	thrown
MD	Modal verb	can shall will may must ought
JJ	Adjective	big fast
JJR	Comparative adjective	bigger
JJS	Superlative adjective	biggest
RB	Adverb	not quickly closely
RBR	Comparative adverb	less-closely faster
RBS	Superlative adverb	fastest
DT	Determiner	the a some both
PDT	Predeterminer	all quite
PRP	Personal Pronoun	I you he she
PRP$	Possessive Pronoun	I you he she
POS	Possessive ending	's
IN	Preposition	of by in
PR	Particle	up off
TO	to	to
WDT	Wh-determiner	which that whatever whichever
WP	Wh-pronoun	who whoever whom what
WP$	Wh-possessive	whose
WRB	Wh-adverb	how where
EX	Expletive there	there
CC	Coordinating conjugation	& and nor or
CD	Cardinal Numbers	1 7 77 one
LS	List item marker	1 B C One
UH	Interjection	ah oh oops
FW	Foreign Words	viva mon toujours
,	Comma	,
:	Mid-sent punct	: ; ...
.	Sent-final punct.	. ! ?
(	Left parenthesis	) } ]
)	Right parenthesis	( { [
#	Pound sign	#
$	Currency symbols	$ € £ ¥
SYM	Other symbols	+ * / < >
EM	Emojis & emoticons	:) ❤