regex - 从行 block 中有选择地提取行

Question

请帮我解决这个正则表达式，我需要每个第一个元映射的所有组件。

短语:.\n元映射*.* 这之后会发生什么？ 我今天刚开始学习正则表达式。

到目前为止，我有点卡住了。我有下面的文档以及我想要的输出。

主要文档:

Phrase: "is"

Phrase: "normal."
Meta Mapping (1000):
 1000   % Normal (Mean Percent of Normal) [Quantitative Concept]
Meta Mapping (1000):
 1000   Normal [Qualitative Concept]
Meta Mapping (1000):
 1000   % normal (Percent normal) [Quantitative Concept]
Processing 00000000.tx.8: The EKG shows nonspecific changes.

Phrase: "The EKG"
Meta Mapping (1000):
 1000   EKG (Electrocardiogram) [Finding]
Meta Mapping (1000):
 1000   EKG (Electrocardiography) [Diagnostic Procedure]

Phrase: "shows"
Meta Mapping (1000):
 1000   Show [Intellectual Product]

Phrase: "nonspecific changes."
Meta Mapping (901):
 694   Nonspecific [Idea or Concept]
 861   changes (Changed status) [Quantitative Concept]
Meta Mapping (901):
 694   Nonspecific [Idea or Concept]
 861   changes (Changing) [Functional Concept]
Meta Mapping (901):
 694   Non-specific (Unspecified) [Qualitative Concept]
 861   changes (Changed status) [Quantitative Concept]
Meta Mapping (901):
 694   Non-specific (Unspecified) [Qualitative Concept]
 861   changes (Changing) [Functional Concept]

<小时/>

我希望结果中每个短语只有一个元映射。

所以

Phrase: "normal."
Meta Mapping (1000):
 1000   % Normal (Mean Percent of Normal) [Quantitative Concept]

Phrase: "The EKG"
Meta Mapping (1000):
 1000   EKG (Electrocardiogram) [Finding]

Phrase: "shows"
Meta Mapping (1000):
 1000   Show [Intellectual Product]

Phrase: "nonspecific changes."
Meta Mapping (901):
 694   Nonspecific [Idea or Concept]
 861   changes (Changed status) [Quantitative Concept]

请帮我解决这个正则表达式，我需要每个第一个元映射的所有组件。谢谢!

Answer 1

我认为这个re可能适合你。只是重新，与 awk 无关。在这里测试regex101.com/

Phrase.*\nMeta.*\n^((?![Meta|\n]).*\n)*

gnu awk 版本:

cat your_data_file | awk  '
BEGIN {
    FS="\n"
    RS="\n\n"
    OFS="\n"
}
NF > 1 {
    print $1, $2
    for (i = 3; i <= NF; i++)
        if (match($i, "Meta Mapping")) {
            print ""
            next
        }
        else
            print $i
    print ""
}
'