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Understanding the Metadata

We have extended the metadata fields provided by arXiv.org.

Field Type Description
id String ArXiv identifer of the form yymm.nnnn or arch-ive/yymmnnn.
version String A literal v followed by a version number of 1 or more digits starting at v1.
published ISODate Published date in the form yyyy-mm-ddThh:mm:ssZ.
updated ISODate Last updated date in the form yyyy-mm-ddThh:mm:ssZ.
title String Queries for the title field are converted to regular expressions by default.
authors Array::String You should use the exact match for the author name.
comment String Queries for the comment field are converted to regular expressions by default.
journal String Queries for the journal field are converted to regular expressions by default.
doi String Only available for the article that has been published on a journal.
categories Array::String You should use the exact match for the category provided by arXiv.
abstract String Queries for the abstract field are converted to regular expressions by default.
subjects Array::String Codes for the PACS, the MSC-class, the ACM-class, or the JEL-class.
themes Array::Object A theme consits of a category and an array of topics.
keywords Array::String Keywords summarize the key points of the article.
tags Array::String Labels that classify eprints in a non-hierarchical manner.
feedback Object Contains the statistics of reviews, bookmarks, readers, ratings, etc.
publication Object Contains the information on publisher, journal, volume, number, etc.
note Object Contains the information on typesetting, language, license, status, etc.