Crossref Metadata

Crossref is a non-for-profit membership organisation working on making scholarly communications better. It is an official Digital Object Identifier (DOI) Registration Agency of the International DOI Foundation. They provide metadata for every DOI that is registered with Crossref.

Crossref Members send Crossref scholarly metadata on research which is collated and standardised into the Crossref metadata dataset. This dataset is made available through services and tools for manuscript tracking, searching, bibliographic management, library systems, author profiling, specialist subject databases, scholarly sharing networks . - source: Crossref Metadata and schema details

The corresponding table created in BigQuery is crossref.crossref_metadataYYYYMMDD.

Summary
Average runtime	12 hours
Average download size	150 GB
Harvest Type	API
Harvest Frequency	Monthly
Runs on remote worker	True
Catchup missed runs	True
Table Write Disposition	Truncate
Update Frequency	Monthly
Credentials Required	No
Uses Telescope Template	Snapshot
Each shard includes all data	Yes

Airflow connections

Note that all values need to be urlencoded. In the config.yaml file, the following airflow connections are required:

crossref

This contains the Crossref Metadata Plus token (https://www.crossref.org/documentation/metadata-plus/).

crossref: http://:<token>@

Latest schema

name	type	mode	description
DOI	STRING	NULLABLE	DOI of the work.
ISBN	STRING	REPEATED
ISSN	STRING	REPEATED
URL	STRING	NULLABLE	URL form of the work’s DOI.
abstract	STRING	NULLABLE	Abstract as a JSON string or a JATS XML snippet encoded into a JSON string.
accepted	RECORD	NULLABLE	Date on which a work was accepted, after being submitted, during a submission process.
accepted.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
alternative_id	STRING	REPEATED	Other identifiers for the work provided by the depositing member
approved	RECORD	NULLABLE	description NA
approved.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
archive	STRING	REPEATED
article_number	STRING	NULLABLE
assertion	RECORD	REPEATED
assertion.explanation	RECORD	NULLABLE
assertion.explanation.URL	STRING	NULLABLE
assertion.group	RECORD	NULLABLE
assertion.group.label	STRING	NULLABLE
assertion.group.name	STRING	NULLABLE
assertion.label	STRING	NULLABLE
assertion.name	STRING	NULLABLE
assertion.order	INTEGER	NULLABLE
assertion.url	STRING	NULLABLE
assertion.value	STRING	NULLABLE
author	RECORD	REPEATED
author.ORCID	STRING	NULLABLE	URL-form of an ORCID identifier
author.affiliation	RECORD	REPEATED
author.affiliation.acronym	STRING	REPEATED
author.affiliation.name	STRING	NULLABLE
author.affiliation.id	RECORD	REPEATED
author.affiliation.id.id	STRING	NULLABLE
author.affiliation.id.id_type	STRING	NULLABLE
author.affiliation.id.asserted_by	STRING	NULLABLE
author.affiliation.place	STRING	REPEATED
author.affiliation.department	STRING	REPEATED
author.authenticated_orcid	BOOLEAN	NULLABLE	If true, record owner asserts that the ORCID user completed ORCID OAuth authentication.
author.family	STRING	NULLABLE
author.given	STRING	NULLABLE
author.name	STRING	NULLABLE
author.sequence	STRING	NULLABLE
author.suffix	STRING	NULLABLE
chair	RECORD	REPEATED
chair.ORCID	STRING	NULLABLE	URL-form of an ORCID identifier
chair.affiliation	RECORD	REPEATED
chair.affiliation.name	STRING	NULLABLE
chair.affiliation.id	RECORD	REPEATED
chair.affiliation.id.id	STRING	NULLABLE
chair.affiliation.id.id_type	STRING	NULLABLE
chair.affiliation.id.asserted_by	STRING	NULLABLE
chair.affiliation.department	STRING	REPEATED
chair.authenticated_orcid	BOOLEAN	NULLABLE	If true, record owner asserts that the ORCID user completed ORCID OAuth authentication.
chair.family	STRING	NULLABLE
chair.given	STRING	NULLABLE
chair.name	STRING	NULLABLE
chair.sequence	STRING	NULLABLE
chair.suffix	STRING	NULLABLE
clinical_trial_number	RECORD	REPEATED
clinical_trial_number.clinical_trial_number	STRING	NULLABLE	Identifier of the clinical trial.
clinical_trial_number.registry	STRING	NULLABLE	DOI of the clinical trial regsitry that assigned the trial number.
clinical_trial_number.type	STRING	NULLABLE	One of preResults, results or postResults
container_title	STRING	REPEATED	Full titles of the containing work (usually a book or journal)
content_created	RECORD	NULLABLE
content_created.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
content_domain	RECORD	NULLABLE	Information on domains that support Crossmark for this work.
content_domain.crossmark_restriction	BOOLEAN	NULLABLE
content_domain.domain	STRING	REPEATED
content_updated	RECORD	NULLABLE	description NA
content_updated.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
created	RECORD	NULLABLE	Date on which the DOI was first registered.
created.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
created.date_time	TIMESTAMP	NULLABLE	ISO 8601 date time.
created.timestamp	INTEGER	NULLABLE	Seconds since UNIX epoch.
description	STRING	NULLABLE
degree	STRING	REPEATED	description NA
deposited	RECORD	NULLABLE	Date on which the work metadata was most recently updated.
deposited.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
deposited.date_time	TIMESTAMP	NULLABLE	ISO 8601 date time.
deposited.timestamp	INTEGER	NULLABLE	Seconds since UNIX epoch.
edition_number	STRING	NULLABLE
editor	RECORD	REPEATED
editor.ORCID	STRING	NULLABLE	URL-form of an ORCID identifier
editor.affiliation	RECORD	REPEATED
editor.affiliation.acronym	STRING	REPEATED
editor.affiliation.name	STRING	NULLABLE
editor.affiliation.id	RECORD	REPEATED
editor.affiliation.id.id	STRING	NULLABLE
editor.affiliation.id.id_type	STRING	NULLABLE
editor.affiliation.id.asserted_by	STRING	NULLABLE
editor.affiliation.place	STRING	REPEATED
editor.affiliation.department	STRING	REPEATED
editor.authenticated_orcid	BOOLEAN	NULLABLE	If true, record owner asserts that the ORCID user completed ORCID OAuth authentication.
editor.family	STRING	NULLABLE
editor.given	STRING	NULLABLE
editor.name	STRING	NULLABLE
editor.sequence	STRING	NULLABLE
editor.suffix	STRING	NULLABLE
event	RECORD	NULLABLE
event.acronym	STRING	NULLABLE
event.end	RECORD	NULLABLE
event.end.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
event.location	STRING	NULLABLE
event.name	STRING	NULLABLE
event.number	STRING	NULLABLE
event.sponsor	STRING	REPEATED
event.start	RECORD	NULLABLE
event.start.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
event.theme	STRING	NULLABLE
funder	RECORD	REPEATED
funder.DOI	STRING	NULLABLE	Optional Open Funder Registry DOI uniquely identifing the funding body (http://www.crossref.org/fundingdata/registry.html)
funder.award	STRING	REPEATED	Award number(s) for awards given by the funding body.
funder.doi_asserted_by	STRING	NULLABLE	Either crossref or publisher
funder.name	STRING	NULLABLE	Funding body primary name
group_title	STRING	NULLABLE	Group title for posted content.
indexed	RECORD	NULLABLE	Date on which the work metadata was most recently indexed. Re-indexing does not imply a metadata change, see deposited for the most recent metadata change date.
indexed.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
indexed.date_time	TIMESTAMP	NULLABLE	ISO 8601 date time.
indexed.timestamp	INTEGER	NULLABLE	Seconds since UNIX epoch.
project	RECORD	REPEATED
project.project_title	RECORD	REPEATED
project.project_title.title	STRING	NULLABLE
project.project_title.language	STRING	NULLABLE
project.project_description	RECORD	REPEATED
project.project_description.description	STRING	NULLABLE
project.project_description.language	STRING	NULLABLE
project.lead_investigator	RECORD	REPEATED
project.lead_investigator.ORCID	STRING	NULLABLE
project.lead_investigator.authenticated_orcid	BOOLEAN	NULLABLE
project.lead_investigator.given	STRING	NULLABLE
project.lead_investigator.family	STRING	NULLABLE
project.lead_investigator.alternate_name	STRING	REPEATED
project.lead_investigator.affiliation	RECORD	REPEATED
project.lead_investigator.affiliation.id	RECORD	REPEATED
project.lead_investigator.affiliation.id.id	STRING	NULLABLE
project.lead_investigator.affiliation.id.id_type	STRING	NULLABLE
project.lead_investigator.affiliation.id.asserted_by	STRING	NULLABLE
project.lead_investigator.affiliation.name	STRING	NULLABLE
project.lead_investigator.affiliation.country	STRING	NULLABLE
project.lead_investigator.role_start	RECORD	NULLABLE
project.lead_investigator.role_start.date_parts	INTEGER	REPEATED
project.lead_investigator.role_end	RECORD	NULLABLE
project.lead_investigator.role_end.date_parts	INTEGER	REPEATED
project.co_lead_investigator	RECORD	REPEATED
project.co_lead_investigator.ORCID	STRING	NULLABLE
project.co_lead_investigator.authenticated_orcid	BOOLEAN	NULLABLE
project.co_lead_investigator.given	STRING	NULLABLE
project.co_lead_investigator.family	STRING	NULLABLE
project.co_lead_investigator.alternate_name	STRING	REPEATED
project.co_lead_investigator.affiliation	RECORD	REPEATED
project.co_lead_investigator.affiliation.id	RECORD	REPEATED
project.co_lead_investigator.affiliation.id.id	STRING	NULLABLE
project.co_lead_investigator.affiliation.id.id_type	STRING	NULLABLE
project.co_lead_investigator.affiliation.id.asserted_by	STRING	NULLABLE
project.co_lead_investigator.affiliation.name	STRING	NULLABLE
project.co_lead_investigator.affiliation.country	STRING	NULLABLE
project.co_lead_investigator.role_start	RECORD	NULLABLE
project.co_lead_investigator.role_start.date_parts	INTEGER	REPEATED
project.co_lead_investigator.role_end	RECORD	NULLABLE
project.co_lead_investigator.role_end.date_parts	INTEGER	REPEATED
project.award_amount	RECORD	NULLABLE
project.award_amount.amount	FLOAT	NULLABLE
project.award_amount.currency	STRING	NULLABLE
project.award_start	RECORD	NULLABLE
project.award_start.date_parts	INTEGER	REPEATED
project.award_planned_end	RECORD	NULLABLE
project.award_planned_end.date_parts	INTEGER	REPEATED
project.award_end	RECORD	NULLABLE
project.award_end.date_parts	INTEGER	REPEATED
project.investigator	RECORD	REPEATED
project.investigator.ORCID	STRING	NULLABLE
project.investigator.authenticated_orcid	BOOLEAN	NULLABLE
project.investigator.given	STRING	NULLABLE
project.investigator.family	STRING	NULLABLE
project.investigator.alternate_name	STRING	REPEATED
project.investigator.affiliation	RECORD	REPEATED
project.investigator.affiliation.id	RECORD	REPEATED
project.investigator.affiliation.id.id	STRING	NULLABLE
project.investigator.affiliation.id.id_type	STRING	NULLABLE
project.investigator.affiliation.id.asserted_by	STRING	NULLABLE
project.investigator.affiliation.name	STRING	NULLABLE
project.investigator.affiliation.country	STRING	NULLABLE
project.investigator.role_start	RECORD	NULLABLE
project.investigator.role_start.date_parts	INTEGER	REPEATED
project.investigator.role_end	RECORD	NULLABLE
project.investigator.role_end.date_parts	INTEGER	REPEATED
project.funding	RECORD	REPEATED
project.funding.type	STRING	NULLABLE
project.funding.scheme	STRING	NULLABLE
project.funding.award_amount	RECORD	NULLABLE
project.funding.award_amount.amount	FLOAT	NULLABLE
project.funding.award_amount.currency	STRING	NULLABLE
project.funding.award_amount.percentage	FLOAT	NULLABLE
project.funding.funder	RECORD	NULLABLE
project.funding.funder.name	STRING	NULLABLE
project.funding.funder.id	RECORD	REPEATED
project.funding.funder.id.id	STRING	NULLABLE
project.funding.funder.id.id_type	STRING	NULLABLE
project.funding.funder.id.asserted_by	STRING	NULLABLE
institution	RECORD	REPEATED
institution.acronym	STRING	REPEATED
institution.department	STRING	REPEATED
institution.name	STRING	NULLABLE
institution.id	RECORD	REPEATED
institution.id.id	STRING	NULLABLE
institution.id.id_type	STRING	NULLABLE
institution.id.asserted_by	STRING	NULLABLE
institution.place	STRING	REPEATED
is_referenced_by_count	INTEGER	NULLABLE	Count of inbound references deposited with Crossref.
isbn_type	RECORD	REPEATED	Date on which content was published.
isbn_type.type	STRING	NULLABLE
isbn_type.value	STRING	NULLABLE
issn_type	RECORD	REPEATED	List of ISSNs with ISSN type information
issn_type.type	STRING	NULLABLE	ISSN type, can either be print ISSN or electronic ISSN.
issn_type.value	STRING	NULLABLE	ISSN value
issue	STRING	NULLABLE	Issue number of an article’s journal.
issued	RECORD	NULLABLE	Earliest of published-print and published-online
issued.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
journal_issue	RECORD	NULLABLE
journal_issue.issue	STRING	NULLABLE
journal_issue.published_online	RECORD	NULLABLE	Date on which content was published online.
journal_issue.published_online.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
journal_issue.published_print	RECORD	NULLABLE	Date on which content was published in print.
journal_issue.published_print.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
language	STRING	NULLABLE
license	RECORD	REPEATED
license.URL	STRING	NULLABLE	Link to a web page describing this license
license.content_version	STRING	NULLABLE	Either vor (version of record,) am (accepted manuscript,) tdm (text and data mining) or unspecified.
license.delay_in_days	INTEGER	NULLABLE	Number of days between the publication date of the work and the start date of this license.
license.start	RECORD	NULLABLE	Date on which this license begins to take effect
license.start.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
license.start.date_time	TIMESTAMP	NULLABLE	ISO 8601 date time.
license.start.timestamp	INTEGER	NULLABLE	Seconds since UNIX epoch.
link	RECORD	REPEATED	URLs to full-text locations.
link.URL	STRING	NULLABLE	Direct link to a full-text download location.
link.content_type	STRING	NULLABLE	Content type (or MIME type) of the full-text object.
link.content_version	STRING	NULLABLE	Either vor (version of record,) am (accepted manuscript) or unspecified.
link.intended_application	STRING	NULLABLE	Either text-mining, similarity-checking or unspecified.
member	INTEGER	NULLABLE	Member identifier of the form http://id.crossref.org/member/MEMBER_ID
original_title	STRING	REPEATED	Work titles in the work’s original publication language.
page	STRING	NULLABLE	Pages numbers of an article within its journal.
part_number	STRING	NULLABLE
posted	RECORD	NULLABLE	Date on which posted content was made available online.
posted.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
prefix	STRING	NULLABLE	DOI prefix identifier of the form http://id.crossref.org/prefix/DOI_PREFIX.
published	RECORD	NULLABLE	Date on which content was published.
published.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
published_online	RECORD	NULLABLE	Date on which the work was published online.
published_online.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
published_other	RECORD	NULLABLE	Date on which the work was published in print.
published_other.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
published_print	RECORD	NULLABLE
published_print.date_parts	INTEGER	REPEATED
publisher	STRING	NULLABLE	Name of work’s publisher.
publisher_location	STRING	NULLABLE	Location of work’s publisher
reference	RECORD	REPEATED	List of references made by the work
reference.DOI	STRING	NULLABLE
reference.ISBN	STRING	NULLABLE
reference.ISSN	STRING	NULLABLE
reference.article_title	STRING	NULLABLE
reference.author	STRING	NULLABLE
reference.component	STRING	NULLABLE
reference.doi_asserted_by	STRING	NULLABLE	One of crossref or publisher.
reference.edition	STRING	NULLABLE
reference.first_page	STRING	NULLABLE
reference.isbn_type	STRING	NULLABLE
reference.issn_type	STRING	NULLABLE	One of pissn or eissn
reference.issue	STRING	NULLABLE
reference.journal_title	STRING	NULLABLE
reference.key	STRING	NULLABLE
reference.series_title	STRING	NULLABLE
reference.standard_designator	STRING	NULLABLE
reference.standards_body	STRING	NULLABLE
reference.unstructured	STRING	NULLABLE
reference.volume	STRING	NULLABLE
reference.volume_title	STRING	NULLABLE
reference.year	STRING	NULLABLE
reference_count	INTEGER	NULLABLE	Deprecated. Same as references-count.
references_count	INTEGER	NULLABLE	Count of outbound references deposited with Crossref
relation	RECORD	NULLABLE	Relations to other works.
relation.based_on_data	RECORD	REPEATED
relation.based_on_data.asserted_by	STRING	NULLABLE
relation.based_on_data.id	STRING	NULLABLE
relation.based_on_data.id_type	STRING	NULLABLE
relation.cites	STRING	REPEATED
relation.compiles	RECORD	REPEATED
relation.compiles.asserted_by	STRING	NULLABLE
relation.compiles.id	STRING	NULLABLE
relation.compiles.id_type	STRING	NULLABLE
relation.continues	RECORD	REPEATED
relation.continues.asserted_by	STRING	NULLABLE
relation.continues.id	STRING	NULLABLE
relation.continues.id_type	STRING	NULLABLE
relation.documents	RECORD	REPEATED
relation.documents.asserted_by	STRING	NULLABLE
relation.documents.id	STRING	NULLABLE
relation.documents.id_type	STRING	NULLABLE
relation.has_comment	RECORD	REPEATED
relation.has_comment.asserted_by	STRING	NULLABLE
relation.has_comment.id	STRING	NULLABLE
relation.has_comment.id_type	STRING	NULLABLE
relation.has_derivation	RECORD	REPEATED
relation.has_derivation.asserted_by	STRING	NULLABLE
relation.has_derivation.id	STRING	NULLABLE
relation.has_derivation.id_type	STRING	NULLABLE
relation.has_format	RECORD	REPEATED
relation.has_format.asserted_by	STRING	NULLABLE
relation.has_format.id	STRING	NULLABLE
relation.has_format.id_type	STRING	NULLABLE
relation.has_manifestation	RECORD	REPEATED
relation.has_manifestation.asserted_by	STRING	NULLABLE
relation.has_manifestation.id	STRING	NULLABLE
relation.has_manifestation.id_type	STRING	NULLABLE
relation.has_manuscript	RECORD	REPEATED
relation.has_manuscript.asserted_by	STRING	NULLABLE
relation.has_manuscript.id	STRING	NULLABLE
relation.has_manuscript.id_type	STRING	NULLABLE
relation.has_part	RECORD	REPEATED
relation.has_part.asserted_by	STRING	NULLABLE
relation.has_part.id	STRING	NULLABLE
relation.has_part.id_type	STRING	NULLABLE
relation.has_preprint	RECORD	REPEATED
relation.has_preprint.asserted_by	STRING	NULLABLE
relation.has_preprint.id	STRING	NULLABLE
relation.has_preprint.id_type	STRING	NULLABLE
relation.has_related_material	RECORD	REPEATED
relation.has_related_material.asserted_by	STRING	NULLABLE
relation.has_related_material.id	STRING	NULLABLE
relation.has_related_material.id_type	STRING	NULLABLE
relation.has_reply	RECORD	REPEATED
relation.has_reply.asserted_by	STRING	NULLABLE
relation.has_reply.id	STRING	NULLABLE
relation.has_reply.id_type	STRING	NULLABLE
relation.has_review	RECORD	REPEATED
relation.has_review.asserted_by	STRING	NULLABLE
relation.has_review.id	STRING	NULLABLE
relation.has_review.id_type	STRING	NULLABLE
relation.has_translation	RECORD	REPEATED
relation.has_translation.asserted_by	STRING	NULLABLE
relation.has_translation.id	STRING	NULLABLE
relation.has_translation.id_type	STRING	NULLABLE
relation.has_version	RECORD	REPEATED
relation.has_version.asserted_by	STRING	NULLABLE
relation.has_version.id	STRING	NULLABLE
relation.has_version.id_type	STRING	NULLABLE
relation.is_based_on	RECORD	REPEATED
relation.is_based_on.asserted_by	STRING	NULLABLE
relation.is_based_on.id	STRING	NULLABLE
relation.is_based_on.id_type	STRING	NULLABLE
relation.is_basis_for	RECORD	REPEATED
relation.is_basis_for.asserted_by	STRING	NULLABLE
relation.is_basis_for.id	STRING	NULLABLE
relation.is_basis_for.id_type	STRING	NULLABLE
relation.is_comment_on	RECORD	REPEATED
relation.is_comment_on.asserted_by	STRING	NULLABLE
relation.is_comment_on.id	STRING	NULLABLE
relation.is_comment_on.id_type	STRING	NULLABLE
relation.is_compiled_by	RECORD	REPEATED
relation.is_compiled_by.asserted_by	STRING	NULLABLE
relation.is_compiled_by.id	STRING	NULLABLE
relation.is_compiled_by.id_type	STRING	NULLABLE
relation.is_continued_by	RECORD	REPEATED
relation.is_continued_by.asserted_by	STRING	NULLABLE
relation.is_continued_by.id	STRING	NULLABLE
relation.is_continued_by.id_type	STRING	NULLABLE
relation.is_data_basis_for	RECORD	REPEATED
relation.is_data_basis_for.asserted_by	STRING	NULLABLE
relation.is_data_basis_for.id	STRING	NULLABLE
relation.is_data_basis_for.id_type	STRING	NULLABLE
relation.is_derived_from	RECORD	REPEATED
relation.is_derived_from.asserted_by	STRING	NULLABLE
relation.is_derived_from.id	STRING	NULLABLE
relation.is_derived_from.id_type	STRING	NULLABLE
relation.is_documented_by	RECORD	REPEATED
relation.is_documented_by.asserted_by	STRING	NULLABLE
relation.is_documented_by.id	STRING	NULLABLE
relation.is_documented_by.id_type	STRING	NULLABLE
relation.is_identical_to	RECORD	REPEATED
relation.is_identical_to.asserted_by	STRING	NULLABLE
relation.is_identical_to.id	STRING	NULLABLE
relation.is_identical_to.id_type	STRING	NULLABLE
relation.is_manifestation_of	RECORD	REPEATED
relation.is_manifestation_of.asserted_by	STRING	NULLABLE
relation.is_manifestation_of.id	STRING	NULLABLE
relation.is_manifestation_of.id_type	STRING	NULLABLE
relation.is_manuscript_of	RECORD	REPEATED
relation.is_manuscript_of.asserted_by	STRING	NULLABLE
relation.is_manuscript_of.id	STRING	NULLABLE
relation.is_manuscript_of.id_type	STRING	NULLABLE
relation.is_original_form_of	RECORD	REPEATED
relation.is_original_form_of.asserted_by	STRING	NULLABLE
relation.is_original_form_of.id	STRING	NULLABLE
relation.is_original_form_of.id_type	STRING	NULLABLE
relation.is_part_of	RECORD	REPEATED
relation.is_part_of.asserted_by	STRING	NULLABLE
relation.is_part_of.id	STRING	NULLABLE
relation.is_part_of.id_type	STRING	NULLABLE
relation.is_preprint_of	RECORD	REPEATED
relation.is_preprint_of.asserted_by	STRING	NULLABLE
relation.is_preprint_of.id	STRING	NULLABLE
relation.is_preprint_of.id_type	STRING	NULLABLE
relation.is_referenced_by	RECORD	REPEATED
relation.is_referenced_by.asserted_by	STRING	NULLABLE
relation.is_referenced_by.id	STRING	NULLABLE
relation.is_referenced_by.id_type	STRING	NULLABLE
relation.is_related_material	RECORD	REPEATED
relation.is_related_material.asserted_by	STRING	NULLABLE
relation.is_related_material.id	STRING	NULLABLE
relation.is_related_material.id_type	STRING	NULLABLE
relation.is_replaced_by	RECORD	REPEATED
relation.is_replaced_by.asserted_by	STRING	NULLABLE
relation.is_replaced_by.id	STRING	NULLABLE
relation.is_replaced_by.id_type	STRING	NULLABLE
relation.is_reply_to	RECORD	REPEATED
relation.is_reply_to.asserted_by	STRING	NULLABLE
relation.is_reply_to.id	STRING	NULLABLE
relation.is_reply_to.id_type	STRING	NULLABLE
relation.is_review_of	RECORD	REPEATED
relation.is_review_of.asserted_by	STRING	NULLABLE
relation.is_review_of.id	STRING	NULLABLE
relation.is_review_of.id_type	STRING	NULLABLE
relation.is_same_as	RECORD	REPEATED
relation.is_same_as.asserted_by	STRING	NULLABLE
relation.is_same_as.id	STRING	NULLABLE
relation.is_same_as.id_type	STRING	NULLABLE
relation.is_supplement_to	RECORD	REPEATED
relation.is_supplement_to.asserted_by	STRING	NULLABLE
relation.is_supplement_to.id	STRING	NULLABLE
relation.is_supplement_to.id_type	STRING	NULLABLE
relation.is_supplemented_by	RECORD	REPEATED
relation.is_supplemented_by.asserted_by	STRING	NULLABLE
relation.is_supplemented_by.id	STRING	NULLABLE
relation.is_supplemented_by.id_type	STRING	NULLABLE
relation.is_translation_of	RECORD	REPEATED
relation.is_translation_of.asserted_by	STRING	NULLABLE
relation.is_translation_of.id	STRING	NULLABLE
relation.is_translation_of.id_type	STRING	NULLABLE
relation.is_variant_form_of	RECORD	REPEATED
relation.is_variant_form_of.asserted_by	STRING	NULLABLE
relation.is_variant_form_of.id	STRING	NULLABLE
relation.is_variant_form_of.id_type	STRING	NULLABLE
relation.is_varient_form_of	RECORD	REPEATED
relation.is_varient_form_of.asserted_by	STRING	NULLABLE
relation.is_varient_form_of.id	STRING	NULLABLE
relation.is_varient_form_of.id_type	STRING	NULLABLE
relation.is_version_of	RECORD	REPEATED
relation.is_version_of.asserted_by	STRING	NULLABLE
relation.is_version_of.id	STRING	NULLABLE
relation.is_version_of.id_type	STRING	NULLABLE
relation.references	RECORD	REPEATED
relation.references.asserted_by	STRING	NULLABLE
relation.references.id	STRING	NULLABLE
relation.references.id_type	STRING	NULLABLE
relation.replaces	RECORD	REPEATED
relation.replaces.asserted_by	STRING	NULLABLE
relation.replaces.id	STRING	NULLABLE
relation.replaces.id_type	STRING	NULLABLE
relation.requires	RECORD	REPEATED
relation.requires.asserted_by	STRING	NULLABLE
relation.requires.id	STRING	NULLABLE
relation.requires.id_type	STRING	NULLABLE
relation.is_financed_by	RECORD	REPEATED
relation.is_financed_by.id	STRING	NULLABLE
relation.is_financed_by.id_type	STRING	NULLABLE
relation.is_financed_by.asserted_by	STRING	NULLABLE
relation.has_expression	RECORD	REPEATED
relation.has_expression.id	STRING	NULLABLE
relation.has_expression.id_type	STRING	NULLABLE
relation.has_expression.asserted_by	STRING	NULLABLE
relation.finances	RECORD	REPEATED
relation.finances.id	STRING	NULLABLE
relation.finances.id_type	STRING	NULLABLE
relation.finances.asserted_by	STRING	NULLABLE
resource	RECORD	NULLABLE
resource.primary	RECORD	NULLABLE
resource.primary.URL	STRING	NULLABLE
resource.secondary	RECORD	REPEATED
resource.secondary.URL	STRING	NULLABLE
review	RECORD	NULLABLE
review.competing_interest_statement	STRING	NULLABLE
review.language	STRING	NULLABLE
review.recommendation	STRING	NULLABLE
review.revision	STRING	NULLABLE
review.revision_round	STRING	NULLABLE
review.running_number	STRING	NULLABLE
review.stage	STRING	NULLABLE
review.type	STRING	NULLABLE
score	FLOAT	NULLABLE
short_container_title	STRING	REPEATED	Abbreviated titles of the containing work.
short_title	STRING	REPEATED	Short or abbreviated work titles
source	STRING	NULLABLE	Currently always Crossref.
standards_body	RECORD	NULLABLE
standards_body.acronym	STRING	NULLABLE
standards_body.name	STRING	NULLABLE
subject	STRING	REPEATED	Subject category names, a controlled vocabulary from Sci-Val. Available for most journal articles
subtitle	STRING	REPEATED	Work subtitles, including original language and translated.
subtype	STRING	NULLABLE
title	STRING	REPEATED	Work titles, including translated titles.
translator	RECORD	REPEATED
translator.ORCID	STRING	NULLABLE	URL-form of an ORCID identifier
translator.affiliation	RECORD	REPEATED
translator.affiliation.name	STRING	NULLABLE
translator.authenticated_orcid	BOOLEAN	NULLABLE	If true, record owner asserts that the ORCID user completed ORCID OAuth authentication.
translator.family	STRING	NULLABLE
translator.given	STRING	NULLABLE
translator.name	STRING	NULLABLE
translator.sequence	STRING	NULLABLE
translator.suffix	STRING	NULLABLE
type	STRING	NULLABLE	Enumeration, one of the type ids from https://api.crossref.org/v1/types.
update_policy	STRING	NULLABLE	Link to an update policy covering Crossmark updates for this work.
update_to	RECORD	REPEATED
update_to.DOI	STRING	NULLABLE	DOI of the updated work.
update_to.label	STRING	NULLABLE	A display-friendly label for the update type.
update_to.type	STRING	NULLABLE	The type of update, for example retraction or correction.
update_to.updated	RECORD	NULLABLE	Date on which the update was published.
update_to.updated.date_parts	INTEGER	REPEATED	Contains an ordered array of year, month, day of month. Only year is required. Note that the field contains a nested array, e.g. [ [ 2006, 5, 19 ] ] to conform to citeproc JSON dates
update_to.updated.date_time	TIMESTAMP	NULLABLE	ISO 8601 date time.
update_to.updated.timestamp	INTEGER	NULLABLE	Seconds since UNIX epoch.
volume	STRING	NULLABLE	Volume number of an article’s journal.
award_start	RECORD	NULLABLE
award_start.date_parts	INTEGER	REPEATED
award	STRING	REPEATED