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suqingdong/PubMed-Pubdate.md

Last active November 30, 2022 02:47
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PubMed-Pubdate.md

efetch db=pubmed返回的XML中，有多个Date字段，检索时到底是用的哪个Date呢？

不同的PubModel，会有不同的Date

https://www.nlm.nih.gov/bsd/licensee/elements_article_source.html

网站显示的是哪个？

前面是PubDate，后面是ArticleDate

有的没有ArticleDate

检索时用的是哪个Date?

  • mdat: modification date - PubmedArticle/MedlineCitation/DateRevised
  • edat: entrez date - PubmedArticle/PubmedData/History/PubMedPubDate[@PubStatus="pubmed"]
  • pdat: publication date
    • PubmedArticle/Article/ArticleDate/
    • PubmedArticle/MedlineCitation/Article/Journal/JournalIssue/PubDate

PS: pdat比较特殊，当ArticleDate存在时，pdat=ArticleDate, 不存在时，pdat=Article/Journal/JournalIssue/PubDate，但PubDate可能没有Day字段，默认为1

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