用NSLinguisticTagger识别人名

Question

我在摆弄NSLinguisticTagger.

识别像名词、动词、介词这样的基本词类型非常有效。

然而，对人名NSLinguisticTagPersonalName的识别在我的测试(iOS8)中几乎行不通。places似乎也运行得很好，但是大多数情况下，人名也被归类为Places。

下面是我的基本设置(使用NSLinguisticTagSchemeNameTypeOrLexicalClass)

    var tagger:NSLinguisticTagger = NSLinguisticTagger(tagSchemes: NSLinguisticTagger.availableTagSchemesForLanguage("en") , options: 3)
    tagger.string = entryString
    tagger.enumerateTagsInRange(NSMakeRange(0, entryString.length), scheme: NSLinguisticTagSchemeNameTypeOrLexicalClass, options: (NSLinguisticTaggerOptions.OmitWhitespace | NSLinguisticTaggerOptions.JoinNames), usingBlock: {
        tag,tokenRange,sentenceRange,_ in
        let token = entryString.substringWithRange(tokenRange)
        println("[\(tag)] \(token) \(tokenRange)")

示例1

 "Meeting with John in Paris"

  Evaluation

 [Verb] Meeting
 [Preposition] with
 [Noun] John
 [Preposition] in
 [PlaceName] Paris

示例2

 "Meeting with John"

  Evaluation

 [Verb] Meeting (0,7)
 [Preposition] with (8,4)
 [PlaceName] John (13,4)

知道我怎么才能改进人名的匹配吗？

另外，我很想知道一个名字需要如何被识别。(我认为像"with“这样的介词是一个很好的指示词…显然这还不够)。对此，我希望有任何想法或更多的见解。这是一个令人兴奋的领域。

Answer 1

显然正确的答案是：“等几年，苹果才能改进Swift 4中的improve。”

以下是在Xcode 9(Beta)中编写和执行的Swift 4代码：

let entryString = "Meeting with John"

let schemes = NSLinguisticTagger.availableTagSchemes(forLanguage: "en")
let options: NSLinguisticTagger.Options = [
    .omitWhitespace, .omitPunctuation, .joinNames
]

let tagger = NSLinguisticTagger(tagSchemes: schemes, options: Int(options.rawValue))
tagger.string = entryString

let rangeOfEntireEntryString = NSRange(location: 0, length: entryString.utf16.count)

tagger.enumerateTags(
    in: rangeOfEntireEntryString,
    scheme: .nameTypeOrLexicalClass,
    options: options)
{ (tag, tokenRange, sentenceRange, _) in
    guard let tag = tag?.rawValue else { return }
    let token = (entryString as NSString).substring(with: tokenRange)
    print("[\(tag)] \(token) \(tokenRange)")
}

下面是第一个示例字符串的结果：

let entryString = "Meeting with John in Paris"

[Noun] Meeting {0, 7}
[Preposition] with {8, 4}
[PersonalName] John {13, 4}
[Preposition] in {18, 2}
[PlaceName] Paris {21, 5}

第二个示例字符串：

let entryString = "Meeting with John"

[Noun] Meeting {0, 7}
[Preposition] with {8, 4}
[PersonalName] John {13, 4}