This blog post is directed toward PubMed users.
Did you know you can download the entire PubMed database, and keep this dataset current with our daily update files? These data are available for free from our FTP site and no longer require a license agreement, whether you’re interested in text mining, or want to create your own database for searching and analytics.
Each year in December, NLM releases a comprehensive (baseline) set of citation records in XML format for download. Every day, incremental update files are made available and include new, revised and deleted citations. Please see the README.txt file for more information and contact info@ncbi.nlm.nih.gov with questions.