Why does PubMed Central require the deposit of complete articles, rather than linking to a journal site for full text?
NLM’s journal abstract database, PubMed, already has links to full text at the online sites of thousands of journals that participate in the freely available LinkOut service. One of the primary goals of PMC is the creation of a digital archive of journal literature which, by definition, means the full text must be deposited in PMC. See the answers to the preceding questions to learn about some of the benefits of depositing content in PMC.