A Digital Object Identifier, or DOI, is a persistent means for identifying content online. They are commonly used with academic articles and allow the document to be found, even if its URL is changed. The DOI of a document does not change, and online databases store metadata, including location, of the document. Use this tag if your query is specific to DOIs.

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DOIs usually occur in bibliographic contexts. Consider tagging your query with , , or first. If your question is about DOIs and doesn't naturally fit into one or more of these or other tags, then consider .

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