In what electronic formats may data be submitted to PubMed Central?
A journal must provide PubMed Central the full text of articles in an XML or SGML format that conforms to an acceptable journal article DTD (Document Type Definition). PMC does not accept articles in HTML format. The original high-resolution, digital image files must also be provided for all figures. A PDF version, if one exists, must be deposited in PMC in addition to the XML/SGML version (but not as the only form) of an article. Supplementary material, in the form of video, audio or data files that may be available with an article, must also be deposited.