Ver. 1.1 These forms allow you to enter metadata and register DOIs. For Journals you may select to register a DOI at the journal level only or for articles within a given issue. • Register only a journal/book level DOI by completing the fields shown below and clicking the 'Submit Journal/Book DOI' button. Mandatory fields for this process are marked with a "+" sign. • Register DOIs for the articles within a given issue by completing the fields and clicking the 'Add Articles' button. Mandatory fields for this process are marked with a "*". For Books you must register book and chapter level information. Click the book data type below and enter the required items in the forms. Mandatory fields are marked with a "*". For Conference Proceedings you must enter event and conference paper information. Click the Conference Proceedings data type below and enter the required items in the forms. Mandatory fields are marked with a "*". In general it is best practice to enter as much data as you can rather than only the mandatory items. Note: Your Crossref username and password will be required at the end of this process to submit data to the system. Please insure your browser allows JavaScript so that the data validation will function. Step 1: Select Data Type Data Type Selection Select Data Type: Journal Book Conference Proceedings NLM File BETA Step 2: Identify the Journal Journal information Title*+ Abbr.*+ Journal DOI+ URL+ Print ISSN*+ Elect ISSN*+ one ISSN required (either one) Volume Issue Issue DOI URL Publication date (numerical values, yyyy mm dd) Year*+ Month: Day: --------------------