Constants used by the English text analyzer.

Constructors

EnglishConstants()

Properties

hashCode → int

The hash code for this object.

read-only, inherited

runtimeType → Type

A representation of the runtime type of the object.

read-only, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a non-existent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

kLemmatizer(String term) → String

The default lemmatizer returns the term unchanged.

kStemmer(String term) → String

The default stemmer returns the term unchanged.

Constants

kAbbreviations → const Map<String, String>

A list of English abbreviations.

{'a' : 'ante', 'A.D.' : 'Anno Domini', 'A.V.' : 'Authorized Version', 'abbrev.' : 'abbreviation', 'Abbrev.' : 'abbreviations…

kSentenceDelimiter → const String

The delimiter inserted at sentence endings to allow splitting of the text into sentences.

r'%~%'

kStopWords → const Set<String>

A collection of stop-words excluded from tokenization.

{'a', 'about', 'above', 'across', 'after', 'against', 'all', 'along', 'although', 'among', 'an', 'and', …

reBracketsAndCarets → const String

Matches all brackets and carets.

r'\(|\)|\[|\]|\{|\}|\<|\>'

reLineEndingSelector → const String

Matches all line endings.

'[\u000A\u000B\u000C\u000D]+'

reNonWordChars → const String

Matches al characters except:

r"[^a-zA-Z0-9À-öø-ÿ¥Œ€@™#-\&_'-]"

rePunctuationSelector → const String

Matches all mid-sentence punctuation.

'(?<=$reWordChars|\\s)[:;,\\-—]+(?=[\\s])|(\\.{2,})'

reSentenceEndingSelector → const String

Matches all sentence endings.

'(?<=$reWordChars|\\s)(\\. )(?=([^a-z])|\\s+|\$)|(\\.)(?=\$)|' '(?<=[^([{])([?!])(?=([^)]}])|\\s+|\$)'

reWordChars → const String

Matches characters used to write words, including:

r"[a-zA-Z0-9À-öø-ÿ¥Œ€@™#-\&_'-]"

reWordEndsWithPeriod → const String

Matches all words that contain only letters and periods and end with a period.

r'(?)([a-zA-Z.]+)(?=([.]))'