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我正在尝试使用 NSLinguisticTagger 来隔离句子中的动词，但遇到了一个问题，即输出不同，具体取决于代码是在 iOS 程序还是在 MacOS 程序中运行。

我的代码如下：

NSString* text = @"The person is a 50 year old gentleman with a book who presents us with a conundrum.";
NSLinguisticTaggerOptions options = NSLinguisticTaggerOmitWhitespace | NSLinguisticTaggerOmitPunctuation | NSLinguisticTaggerJoinNames;
NSLinguisticTagger* tagger = [[NSLinguisticTagger alloc] initWithTagSchemes:@[NSLinguisticTagSchemeNameTypeOrLexicalClass]
                                                                    options:options];
tagger.string = text;
[tagger enumerateTagsInRange:NSMakeRange(0, [tagger.string length])
                      scheme:NSLinguisticTagSchemeNameTypeOrLexicalClass
                     options:options
                  usingBlock:^(NSString *tag, NSRange tokenRange, NSRange sentenceRange, BOOL *stop) {
                      NSString *token = [text substringWithRange:tokenRange];
                      NSLog(@"%@: %@", token, tag);
                  }];

在OSX程序中运行此代码片段，我正确地得到以下输出（“presents”被正确识别为动词）：

[                    AppDelegate (0x101b0bcb0)]: The: Determiner
[                    AppDelegate (0x101b0bcb0)]: person: Noun
[                    AppDelegate (0x101b0bcb0)]: is: Verb
[                    AppDelegate (0x101b0bcb0)]: a: Determiner
[                    AppDelegate (0x101b0bcb0)]: 50: Number
[                    AppDelegate (0x101b0bcb0)]: year: Noun
[                    AppDelegate (0x101b0bcb0)]: old: Adjective
[                    AppDelegate (0x101b0bcb0)]: gentleman: Noun
[                    AppDelegate (0x101b0bcb0)]: with: Preposition
[                    AppDelegate (0x101b0bcb0)]: a: Determiner
[                    AppDelegate (0x101b0bcb0)]: book: Noun
[                    AppDelegate (0x101b0bcb0)]: who: Pronoun
[                    AppDelegate (0x101b0bcb0)]: presents: Verb
[                    AppDelegate (0x101b0bcb0)]: us: Pronoun
[                    AppDelegate (0x101b0bcb0)]: with: Preposition
[                    AppDelegate (0x101b0bcb0)]: a: Determiner
[                    AppDelegate (0x101b0bcb0)]: conundrum: Noun

但是， iOS程序中相同的代码块会导致以下输出（“presents”被错误地识别为名词）：

[                      AppDelegate (0x8d2f000)]: The: Determiner
[                      AppDelegate (0x8d2f000)]: person: Noun
[                      AppDelegate (0x8d2f000)]: is: Verb
[                      AppDelegate (0x8d2f000)]: a: Determiner
[                      AppDelegate (0x8d2f000)]: 50: Number
[                      AppDelegate (0x8d2f000)]: year: Noun
[                      AppDelegate (0x8d2f000)]: old: Adjective
[                      AppDelegate (0x8d2f000)]: gentleman: Noun
[                      AppDelegate (0x8d2f000)]: with: Preposition
[                      AppDelegate (0x8d2f000)]: a: Determiner
[                      AppDelegate (0x8d2f000)]: book: Noun
[                      AppDelegate (0x8d2f000)]: who: Pronoun
[                      AppDelegate (0x8d2f000)]: presents: Noun
[                      AppDelegate (0x8d2f000)]: us: Pronoun
[                      AppDelegate (0x8d2f000)]: with: Preposition
[                      AppDelegate (0x8d2f000)]: a: Determiner
[                      AppDelegate (0x8d2f000)]: conundrum: Noun

有谁知道我为什么会得到不同的输出，以及如何正确地让 iOS 程序将礼物识别为动词？

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1 回答 1

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标注器是随机的，即它总是出错。由于 iOS 设备资源有限，底层语言模型不如 OS X 版本精确。如果您想要更高的准确性，请使用基于规则的解析器。不过，您必须处理模棱两可的问题。

于 2013-12-28T15:15:20.000 回答