Question

请帮助我将Stanford Parser SemanticGraph输出编码为节点和边缘的数字列表其中节点具有ID和标签，边缘由两个节点ID和边缘权重组成，如：节点列表：1 A，2 B ...边缘列表：1 2 10,2 1 10。虽然，根据stanford nlp javadoc - ＆gt; Class SemanticGraph：

没有一次返回所有边缘的机制（例如 edgeSet()）。这是故意的。使用edgeIterable()进行迭代必要时边缘。

因此，我尝试使用一个类似的例子，其中一个论坛成员提出了建议，但没有让它发挥作用。我正在使用Eclipse Luna。有我的尝试：

import java.io.*;
import java.util.*;

import edu.stanford.nlp.io.*;
import edu.stanford.nlp.ling.*;
import edu.stanford.nlp.pipeline.*;
import edu.stanford.nlp.trees.*;
import edu.stanford.nlp.util.*;

public class StanfordCoreNlpDemo {
    public static void main(String[] args) throws IOException {
        PrintWriter out;
        if (args.length > 1) {
            out = new PrintWriter(args[1]);
        } else {
           out = new PrintWriter(System.out);
        }

        PrintWriter xmlOut = null;
        if (args.length > 2) {
            xmlOut = new PrintWriter(args[2]);
        }

        StanfordCoreNLP pipeline = new StanfordCoreNLP();
        Annotation annotation;
        if (args.length > 0) {
            annotation = new Annotation(IOUtils.slurpFileNoExceptions(args[0]));
        } else {
            annotation = new Annotation("Out of the unconstructed nature ...");    
        }

        pipeline.annotate(annotation);
        pipeline.prettyPrint(annotation, out);
        if (xmlOut != null) {
            pipeline.xmlPrint(annotation, xmlOut);
        }

        // An Annotation is a Map and you can get and use the various analyses individually.
        // For instance, this gets the parse tree of the first sentence in the text.
        List<CoreMap> sentences =  annotation.get(CoreAnnotations.SentencesAnnotation.class);
        if (sentences != null && sentences.size() > 0) {
            CoreMap sentence = sentences.get(0);
            Tree tree = sentence.get(TreeCoreAnnotations.TreeAnnotation.class);
            out.println();
            out.println("The first sentence parsed is:");
            tree.pennPrint(out);
            SemanticGraph sg = sg.get(StanfordCoreNlpSemGraph.class);
            for (SemanticGraphEdge edge : sg.getEdgesIterable()) {
                int headIndex = edge.getGovernor().index();
                int depIndex = edge.getDependent().index();
                int weight = 1 // Not sure what "edge weight" if at all put here?
                System.out.printf("%d %d %d%n", headIndex, depIndex, weight);
            }
        }
    }
}

我遇到了两个错误：

SemanticGraph cannot be resolved to a type --> SemanticGraph sg = sg.get(StanfordCoreNlpSemGraph.class); 
SemanticGraphEdge cannot be resolved to a type --> for (SemanticGraphEdge edge : sg.getEdgesIterable())

此外，我需要通过迭代句子中的标记并将其打印出来获得的节点列表。但同样，我不确定如何实现它。非常感谢提前你的帮助。

Answer 1

为什么要尝试从自身获取语义图实例？

在我看来，你应该从句子中获取SemanticGraph，使用：

SemanticGraph sg = sentence.get(SemanticGraphCoreAnnotations.BasicDependenciesAnnotation.class);

如何输出Stanford Parser SemanticGraph作为节点和边的数字列表

1 个答案: