Required, Recommended, and Optional Elements

Content types:

• Journal
• Book
• Conference Proceedings
• Database
• Dissertation
• Posted content
• Report-paper
• Standard

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Journal 

Required Elements

• Journal: full_title, ISSN or title-level DOI
• Issue issue, publication_date (year)
• Article: titles, publication_date (year), doi_data

Issue elements are only required if a DOI is being deposited at the issue level. Article elements are likewise only required for article DOI deposits.

Recommended Elements

• Journal: abbrev_title, doi_data, coden, journal_issue
• Issue: publication_date (month, day), journal_volume, contributors, issue, doi_data
• Article: contributors, ORCIDs, publication_date (day, month), pages (first_page, last_page), citation_list
  also strongly recommended:  funding, license,  Crossmark metadata and JATS-formatted abstracts

Optional Elements

• publisher_item
• special_numbering
• component_list

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Book 

Required Elements

• Series: titles, ISSN, volume, ISBN, publication_date (year), publisher (publisher_name)
• Set: titles, ISBN, volume
• Book: titles, publication_date (year), ISBN‡if no ISBN is available, use <noisbn> element, publisher
• Chapter:doi_data

Recommended Elements

• Series: doi_data,edition_number,contributors, coden, series_number, citation_list
• Set: contributors, doi_data, edition_number, contributors, citation_list, doi_data
• Book: contributors, ORCIDs, edition_number, doi_data, citation_list, metadata for funding, license, and CrossMark
• Chapter: contributors, titles, pages, publication_date, citation_list
  also recommended:  funding, license, and CrossMark metadata

Optional Elements

• publisher_item
• part_number
• component_number
• component_list

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Conference Proceedings

Required Elements

• Series: titles, ISSN, ISBN*required if volume title and volume number are present
• Proceeding level: ISBN, proceedings_title, publisher, publication_date (year)
• Conference paper: contributors, titles, doi_data

Recommended Elements

• Series level: doi_data, contributors, coden, series_number
• Conference level: volume, contributors, ORCIDs, event_metadata (conference_date, conference_location, conference_acronym, conference_theme, conference_sponsor, conference_number), proceedings_subject
• Conference paper: publication_date, pages, citation_list
  also recommended:  funding, license, and CrossMark metadata

Optional Elements

• publisher_item
• component_list

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Database

Required Elements

• Database level: titles
• Dataset level: doi_data

Recommended Elements

• Database level: contributors, description, database_date, publisher, institution, doi_data
• Dataset level: contributors, titles, database_date, description, format, citation_list, component_list
  also recommended:  funding, license, and CrossMark metadata

Optional Elements

• publisher_item
• component_list

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Dissertation

Required Elements

• person_name
• titles
• approval_date
• institution
• doi_data

Recommended Elements

• ISBN
• degree
• ORCID
• also recommended:  funding, license, and CrossMark metadata

Optional Elements

• citation_list
• component_list

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Posted content

Required Elements

• titles
• posted_date
• doi_data

Recommended Elements

• group_title
• contributors
• acceptance_date
• institution
• item_number
• abstracts
• doi_data
• citation_list
• also recommended:  funding, license,  Crossmark metadata and JATS-formatted abstracts

Optional Elements

• component_list

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Report-paper

Required Elements

• Series level: titles, ISSN
• Report level: title, publication_date (year)

Recommended Elements

• Series level: contributors, coden, series_number, volume, doi_data, edition_number, approval_date, publisher, institution, doi_data, citation_list
• Report level: contributors, ORCIDs, edition_number, approval_date, ISBN, publisher, institution, citation_list
  also recommended:  funding, license, and CrossMark metadata

Optional Elements

• publisher_item
• contract_number

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Standard 

Required Elements

• Standard level: title,  designator(s), approval_date, standard_body_name, standard_body_acronym
• Item level: contributors, titles, component_number, publication_date (year), pages, publisher_item, doi_data

Recommended Elements

• Standard level: contributors, edition_number, ISBN, institution, citation_list
  also recommended: funding, license, and CrossMark metadata
• Item level: citation_list

Optional Elements

• publisher_item
• content_item
• component_list