如何检索带有<chem>与<math chem>标签的维基百科条目

Since regular Wikipedia search ignores angle brackets like < and >, you need more targeted tools to track down articles with these chemistry-specific tags. Here are three reliable, actionable methods:

• Use Wikipedia's Advanced Search
  This is the simplest no-code approach. Head to Wikipedia's advanced search interface, then locate the "Page content" section. Enter <chem> directly into the text box, or combine both tags with the OR operator: <chem> OR <math chem>. To filter out talk pages, user pages, and other non-article content, set the "Namespace" dropdown to "Article" before running the search. This tool respects the angle brackets and returns pages where the raw edit content includes those exact tags.

• Leverage the Wikipedia API
  For more control (or to automate the search), use the Wikipedia API with custom search parameters. You can target pages containing the tags using the insource: prefix. For example, a query like insource:"<chem>" OR insource:"<math chem>" will pull up pages with either tag. To restrict results to main-space articles (the core Wikipedia content), add srnamespace=0 to your API request. You can test this directly in the API sandbox or build a simple script to fetch results programmatically.

• Query with Wikidata SPARQL
  If you’re comfortable with structured queries, Wikidata’s SPARQL endpoint lets you retrieve articles based on their raw content. A basic query to find articles with either tag would look like this:

  SELECT ?article ?articleLabel WHERE {
    ?article schema:about ?item ;
             schema:isPartOf <https://en.wikipedia.org/> ;
             schema:text ?text .
    FILTER (CONTAINS(?text, "<chem>") || CONTAINS(?text, "<math chem>"))
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en" }
  }
  

  This returns English Wikipedia articles with the tags, along with their human-readable labels for clarity.

A quick note: All these methods target the raw edit content of pages (where <chem> and <math chem> tags are stored), not the rendered view. So you’ll get exactly the pages where editors used these chemistry formatting tags.

内容的提问来源于stack exchange，提问作者mhchem