crossref-mcp-server

{'type': 'object', '$schema': 'https://json-schema.org/draft/2020-12/schema', 'required': ['member_id'], 'properties': {'member_id': {'type': 'integer', 'maximum': 9007199254740991, 'description': 'Crossref member ID â\x80\x94 a positive integer, e.g. 297 (Springer) or 340 (PLOS). Resolve a DOI prefix to a member ID first with crossref_get_prefix.', 'exclusiveMinimum': 0}}, 'additionalProperties': False}

{'type': 'object', 'anyOf': [{'not': {'required': ['error']}, 'required': ['id']}, {'required': ['error']}], '$schema': 'https://json-schema.org/draft/2020-12/schema', 'properties': {'id': {'type': 'number', 'description': 'Crossref member ID'}, 'error': {'type': 'object', 'required': ['code', 'message'], 'properties': {'code': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': -9007199254740991, 'description': 'JSON-RPC error code for this failure.'}, 'data': {'type': 'object', 'properties': {'reason': {'type': 'string', 'examples': ['rate_limited', 'upstream_unavailable', 'malformed_response', 'request_timeout', 'member_not_found'], 'description': 'Machine-readable failure mode. Declared by this tool: `rate_limited`: Crossref answered HTTP 429 and the limit did not clear inside the retry budget. `upstream_unavailable`: Crossref was unreachable, returned a 5xx status, or served an HTML error page instead of JSON. `malformed_response`: Crossref returned HTTP 200 with a body that is not valid JSON. `request_timeout`: Crossref did not respond within CROSSREF_TIMEOUT_MS, or answered HTTP 408/504. `member_not_found`: No Crossref member exists for the given ID. Other values are possible when a failure originates below the handler.'}, 'recovery': {'type': 'object', 'required': ['hint'], 'properties': {'hint': {'type': 'string'}}, 'description': 'Actionable next step for the caller.', 'additionalProperties': {}}, 'retryable': {'type': 'boolean', 'description': 'Whether retrying may succeed.'}}, 'additionalProperties': {}}, 'message': {'type': 'string', 'description': 'Human-readable description of what went wrong.'}}, 'description': 'Present when the call failed. Absent on success.', 'additionalProperties': {}}, 'names': {'type': 'array', 'items': {'type': 'string'}, 'description': 'Alternate and imprint names registered under this member'}, 'counts': {'type': 'object', 'properties': {'totalDois': {'type': 'number', 'description': 'Total DOIs registered by this member (current + backfile)'}, 'currentDois': {'type': 'number', 'description': 'DOIs registered in the current (recent) window'}, 'backfileDois': {'type': 'number', 'description': 'DOIs registered in the backfile (older) window'}}, 'description': 'Registered DOI counts', 'additionalProperties': False}, 'coverage': {'type': 'array', 'items': {'type': 'object', 'required': ['category'], 'properties': {'current': {'type': 'number', 'description': 'Coverage fraction (0â\x80\x931) among current (recent) DOIs'}, 'backfile': {'type': 'number', 'description': 'Coverage fraction (0â\x80\x931) among backfile (older) DOIs'}, 'category': {'type': 'string', 'description': 'Metadata deposit category, e.g. "references", "abstracts", "orcids", "funders", "licenses", "affiliations"'}}, 'description': 'Metadata deposit coverage for one category', 'additionalProperties': False}, 'description': 'Per-category metadata deposit coverage â\x80\x94 each a 0â\x80\x931 fraction split into current (recent) and backfile (older) DOIs. Signals how completely this publisher deposits references, abstracts, ORCIDs, funders, licenses, and similar metadata.'}, 'deposits': {'type': 'boolean', 'description': 'Whether the member deposits any metadata with Crossref'}, 'location': {'type': 'string', 'description': 'Publisher location (city, region, country)'}, 'prefixes': {'type': 'array', 'items': {'type': 'string'}, 'description': 'DOI prefixes owned by this member, e.g. "10.1038"'}, 'primaryName': {'type': 'string', 'description': 'Primary publisher/organization name'}, 'worksByType': {'type': 'array', 'items': {'type': 'object', 'required': ['type', 'count'], 'properties': {'type': {'type': 'string', 'description': 'Crossref work type, e.g. "journal-article", "book-chapter", "posted-content"'}, 'count': {'type': 'number', 'description': 'Number of DOIs of this type registered by the member'}}, 'description': 'DOI count for one work type', 'additionalProperties': False}, 'description': 'DOI counts broken down by work type (all DOIs), sorted by count descending'}, 'depositsArticles': {'type': 'boolean', 'description': 'Whether the member deposits journal-article metadata'}}, 'additionalProperties': False}

{'type': 'object', '$schema': 'https://json-schema.org/draft/2020-12/schema', 'required': ['prefix'], 'properties': {'prefix': {'type': 'string', 'pattern': '^10\\.\\d+$', 'description': 'DOI prefix in the format "10.NNNN" â\x80\x94 the registrant portion of a DOI with no "/suffix", e.g. "10.1038" or "10.1371".'}}, 'additionalProperties': False}

{'type': 'object', 'anyOf': [{'not': {'required': ['error']}, 'required': ['prefix']}, {'required': ['error']}], '$schema': 'https://json-schema.org/draft/2020-12/schema', 'properties': {'error': {'type': 'object', 'required': ['code', 'message'], 'properties': {'code': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': -9007199254740991, 'description': 'JSON-RPC error code for this failure.'}, 'data': {'type': 'object', 'properties': {'reason': {'type': 'string', 'examples': ['rate_limited', 'upstream_unavailable', 'malformed_response', 'request_timeout', 'prefix_not_found'], 'description': 'Machine-readable failure mode. Declared by this tool: `rate_limited`: Crossref answered HTTP 429 and the limit did not clear inside the retry budget. `upstream_unavailable`: Crossref was unreachable, returned a 5xx status, or served an HTML error page instead of JSON. `malformed_response`: Crossref returned HTTP 200 with a body that is not valid JSON. `request_timeout`: Crossref did not respond within CROSSREF_TIMEOUT_MS, or answered HTTP 408/504. `prefix_not_found`: The DOI prefix is not registered with Crossref. Other values are possible when a failure originates below the handler.'}, 'recovery': {'type': 'object', 'required': ['hint'], 'properties': {'hint': {'type': 'string'}}, 'description': 'Actionable next step for the caller.', 'additionalProperties': {}}, 'retryable': {'type': 'boolean', 'description': 'Whether retrying may succeed.'}}, 'additionalProperties': {}}, 'message': {'type': 'string', 'description': 'Human-readable description of what went wrong.'}}, 'description': 'Present when the call failed. Absent on success.', 'additionalProperties': {}}, 'prefix': {'type': 'string', 'description': 'The DOI prefix that was resolved, e.g. "10.1038"'}, 'memberId': {'type': 'number', 'description': 'Numeric Crossref member ID that owns this prefix â\x80\x94 pass to crossref_get_member for the full publisher record'}, 'ownerName': {'type': 'string', 'description': 'Name of the member (publisher) that owns this prefix'}}, 'additionalProperties': False}

{'type': 'object', '$schema': 'https://json-schema.org/draft/2020-12/schema', 'required': ['doi'], 'properties': {'doi': {'type': 'string', 'pattern': '^(?:https?:\\/\\/(?:dx\\.)?doi\\.org\\/|doi:)?10\\.\\d{4,9}\\/\\S+$', 'description': 'DOI in the format "10.NNNN/suffix", e.g. "10.1038/nature12373". A resolver-wrapped form â\x80\x94 "https://doi.org/10.1038/nature12373", "https://dx.doi.org/â\x80¦", "doi:10.1038/nature12373" â\x80\x94 is accepted and unwrapped.'}, 'limit': {'type': 'integer', 'default': 100, 'maximum': 500, 'minimum': 1, 'description': 'Maximum number of references to return in one page (1â\x80\x93500, default 100). Most works fit in a single page; bibliography records can carry tens of thousands.'}, 'offset': {'type': 'integer', 'default': 0, 'maximum': 9007199254740991, 'minimum': 0, 'description': 'Zero-based index of the first reference to return. Pass the nextOffset value from the previous response to continue through a long reference list.'}}, 'additionalProperties': False}

{'type': 'object', 'anyOf': [{'not': {'required': ['error']}, 'required': ['doi', 'referenceCount', 'offset', 'references']}, {'required': ['error']}], '$schema': 'https://json-schema.org/draft/2020-12/schema', 'properties': {'cap': {'type': 'number', 'description': 'The limit that was applied to this page.'}, 'doi': {'type': 'string', 'description': 'DOI of the citing work'}, 'error': {'type': 'object', 'required': ['code', 'message'], 'properties': {'code': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': -9007199254740991, 'description': 'JSON-RPC error code for this failure.'}, 'data': {'type': 'object', 'properties': {'reason': {'type': 'string', 'examples': ['rate_limited', 'upstream_unavailable', 'malformed_response', 'request_timeout', 'doi_not_found'], 'description': 'Machine-readable failure mode. Declared by this tool: `rate_limited`: Crossref answered HTTP 429 and the limit did not clear inside the retry budget. `upstream_unavailable`: Crossref was unreachable, returned a 5xx status, or served an HTML error page instead of JSON. `malformed_response`: Crossref returned HTTP 200 with a body that is not valid JSON. `request_timeout`: Crossref did not respond within CROSSREF_TIMEOUT_MS, or answered HTTP 408/504. `doi_not_found`: Valid DOI format but no Crossref record exists. Other values are possible when a failure originates below the handler.'}, 'recovery': {'type': 'object', 'required': ['hint'], 'properties': {'hint': {'type': 'string'}}, 'description': 'Actionable next step for the caller.', 'additionalProperties': {}}, 'retryable': {'type': 'boolean', 'description': 'Whether retrying may succeed.'}}, 'additionalProperties': {}}, 'message': {'type': 'string', 'description': 'Human-readable description of what went wrong.'}}, 'description': 'Present when the call failed. Absent on success.', 'additionalProperties': {}}, 'shown': {'type': 'number', 'description': 'Number of references returned in this page.'}, 'notice': {'type': 'string', 'description': 'Coverage guidance when no references are indexed, or a range explanation when the requested offset is past the end of the list. Absent on a normal page.'}, 'offset': {'type': 'number', 'description': 'Zero-based index of the first returned reference within the deposited list'}, 'truncated': {'type': 'boolean', 'description': 'True when references remain beyond this page. Absent when the page is the last.'}, 'nextOffset': {'type': 'number', 'description': 'Offset to pass in the next call to retrieve the following page. Absent when this page reaches the end of the reference list.'}, 'references': {'type': 'array', 'items': {'type': 'object', 'properties': {'doi': {'type': 'string', 'description': 'Resolved DOI for this reference, when available'}, 'key': {'type': 'string', 'description': 'Reference key as deposited'}, 'issn': {'type': 'string', 'description': 'ISSN of the referenced journal'}, 'year': {'type': 'string', 'description': 'Publication year of the referenced work'}, 'author': {'type': 'string', 'description': 'Author field from the reference entry, with inline formatting markup removed'}, 'volume': {'type': 'string', 'description': 'Volume'}, 'firstPage': {'type': 'string', 'description': 'First page'}, 'articleTitle': {'type': 'string', 'description': 'Article title of the referenced work, with inline formatting markup removed'}, 'journalTitle': {'type': 'string', 'description': 'Journal title of the referenced work, with inline formatting markup removed'}, 'unstructured': {'type': 'string', 'description': 'Citation string as deposited by the publisher, with formatting markup and structured-citation tags removed. Angle-bracketed text that is not recognizable as markup â\x80\x94 a cited URL, a Miller index, a DOI fragment â\x80\x94 is left exactly as deposited, and so is a link whose href holds an address the text it wraps does not already carry.'}}, 'description': 'Reference entry', 'additionalProperties': False}, 'description': 'Page of the outgoing reference list'}, 'referenceCount': {'type': 'number', 'description': 'Total number of references in the deposited list'}}, 'additionalProperties': False}

{'type': 'object', '$schema': 'https://json-schema.org/draft/2020-12/schema', 'required': ['doi'], 'properties': {'doi': {'type': 'string', 'pattern': '^(?:https?:\\/\\/(?:dx\\.)?doi\\.org\\/|doi:)?10\\.\\d{4,9}\\/\\S+$', 'description': 'DOI in the format "10.NNNN/suffix", e.g. "10.1038/nature12373". A resolver-wrapped form â\x80\x94 "https://doi.org/10.1038/nature12373", "https://dx.doi.org/â\x80¦", "doi:10.1038/nature12373" â\x80\x94 is accepted and unwrapped.'}, 'limit': {'type': 'integer', 'default': 25, 'maximum': 500, 'minimum': 1, 'description': 'Maximum number of authors to return in one page (1â\x80\x93500, default 25). Ordinary records fit in a single page; large-collaboration papers in particle physics and genomics deposit thousands.'}, 'offset': {'type': 'integer', 'default': 0, 'maximum': 9007199254740991, 'minimum': 0, 'description': 'Zero-based index of the first author to return. Pass the nextOffset value from the previous response to continue through a long author list. Only the author list is paged; every other field of the record is returned in full on every page.'}}, 'additionalProperties': False}

{'type': 'object', 'anyOf': [{'not': {'required': ['error']}, 'required': ['doi']}, {'required': ['error']}], '$schema': 'https://json-schema.org/draft/2020-12/schema', 'properties': {'cap': {'type': 'number', 'description': 'The limit that was applied to this page of authors.'}, 'doi': {'type': 'string', 'description': 'Canonical DOI'}, 'url': {'type': 'string', 'description': 'DOI resolution URL'}, 'isbn': {'type': 'array', 'items': {'type': 'string'}, 'description': 'ISBN(s) as deposited â\x80\x94 for a book chapter, those of the containing book. Omitted when the record deposits none.'}, 'issn': {'type': 'array', 'items': {'type': 'string'}, 'description': 'ISSN(s) of the containing journal'}, 'page': {'type': 'string', 'description': 'Page range as deposited, e.g. "357-362"'}, 'type': {'type': 'string', 'description': 'Work type (e.g. journal-article, book-chapter, posted-content)'}, 'error': {'type': 'object', 'required': ['code', 'message'], 'properties': {'code': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': -9007199254740991, 'description': 'JSON-RPC error code for this failure.'}, 'data': {'type': 'object', 'properties': {'reason': {'type': 'string', 'examples': ['rate_limited', 'upstream_unavailable', 'malformed_response', 'request_timeout', 'doi_not_found'], 'description': 'Machine-readable failure mode. Declared by this tool: `rate_limited`: Crossref answered HTTP 429 and the limit did not clear inside the retry budget. `upstream_unavailable`: Crossref was unreachable, returned a 5xx status, or served an HTML error page instead of JSON. `malformed_response`: Crossref returned HTTP 200 with a body that is not valid JSON. `request_timeout`: Crossref did not respond within CROSSREF_TIMEOUT_MS, or answered HTTP 408/504. `doi_not_found`: Valid DOI format but no Crossref record exists. Other values are possible when a failure originates below the handler.'}, 'recovery': {'type': 'object', 'required': ['hint'], 'properties': {'hint': {'type': 'string'}}, 'description': 'Actionable next step for the caller.', 'additionalProperties': {}}, 'retryable': {'type': 'boolean', 'description': 'Whether retrying may succeed.'}}, 'additionalProperties': {}}, 'message': {'type': 'string', 'description': 'Human-readable description of what went wrong.'}}, 'description': 'Present when the call failed. Absent on success.', 'additionalProperties': {}}, 'issue': {'type': 'string', 'description': 'Issue of the container the work appears in'}, 'links': {'type': 'array', 'items': {'type': 'object', 'required': ['url'], 'properties': {'url': {'type': 'string', 'description': 'Full-text URL'}, 'contentType': {'type': 'string', 'description': 'MIME type of linked content'}, 'intendedApplication': {'type': 'string', 'description': 'Intended use (text-mining, similarity-checking, etc.)'}}, 'description': 'Registered full-text link', 'additionalProperties': False}, 'description': 'Registered full-text links'}, 'shown': {'type': 'number', 'description': 'Number of authors returned in this page.'}, 'title': {'type': 'string', 'description': 'Work title'}, 'notice': {'type': 'string', 'description': 'When updatedBy is present, the update types Crossref records for this work with the source of each, and where the notice is read. Then which authors this page covers and the offset that reaches the next ones, or an explanation when the requested offset is past the end of the author list. Both share this one string when both apply. Absent when the page holds the whole author list and no update is recorded.'}, 'offset': {'type': 'number', 'description': 'Zero-based index of the first returned author within the deposited list. Omitted alongside authors when the record deposits no author field.'}, 'volume': {'type': 'string', 'description': 'Volume of the container the work appears in'}, 'authors': {'type': 'array', 'items': {'type': 'object', 'properties': {'name': {'type': 'string', 'description': 'Name when no given/family split is available'}, 'given': {'type': 'string', 'description': 'Given (first) name'}, 'orcid': {'type': 'string', 'description': 'ORCID identifier URI'}, 'family': {'type': 'string', 'description': 'Family (last) name'}, 'sequence': {'type': 'string', 'description': 'Author order role (first, additional)'}, 'affiliation': {'type': 'array', 'items': {'type': 'object', 'properties': {'ror': {'type': 'string', 'description': 'ROR identifier for the affiliated organization, when the deposit carries one. It is the whole identity of an affiliation deposited without a name.'}, 'name': {'type': 'string', 'description': 'Affiliation name as deposited. Absent when the publisher asserted the organization by identifier alone, where ror carries it instead.'}}, 'description': 'Affiliation', 'additionalProperties': False}, 'description': 'Institutional affiliations'}}, 'description': 'Author or contributor', 'additionalProperties': False}, 'description': 'Page of the author and contributor list, bounded by limit. Omitted when the record deposits no author field at all.'}, 'editors': {'type': 'array', 'items': {'type': 'object', 'properties': {'name': {'type': 'string', 'description': 'Name when no given/family split is available'}, 'given': {'type': 'string', 'description': 'Given (first) name'}, 'orcid': {'type': 'string', 'description': 'ORCID identifier URI'}, 'family': {'type': 'string', 'description': 'Family (last) name'}, 'sequence': {'type': 'string', 'description': 'Author order role (first, additional)'}, 'affiliation': {'type': 'array', 'items': {'type': 'object', 'properties': {'ror': {'type': 'string', 'description': 'ROR identifier for the affiliated organization, when the deposit carries one. It is the whole identity of an affiliation deposited without a name.'}, 'name': {'type': 'string', 'description': 'Affiliation name as deposited. Absent when the publisher asserted the organization by identifier alone, where ror carries it instead.'}}, 'description': 'Affiliation', 'additionalProperties': False}, 'description': 'Institutional affiliations'}}, 'description': 'Author or contributor', 'additionalProperties': False}, 'description': 'Editors of the work, or of the book or proceedings containing it, in the entry shape authors use. Returned whole â\x80\x94 never paged by offset and limit, and never counted in authorCount. Omitted when the record deposits none.'}, 'funders': {'type': 'array', 'items': {'type': 'object', 'properties': {'doi': {'type': 'string', 'description': 'Funder DOI â\x80\x94 the Crossref Funder Registry entry this assertion resolved to'}, 'ror': {'type': 'string', 'description': 'ROR identifier for the funding organization, when the deposit carries one. It is the whole identity of an assertion deposited without a name.'}, 'name': {'type': 'string', 'description': 'Funder name as deposited. Absent when the publisher asserted the funder by identifier alone, where ror carries it instead.'}, 'award': {'type': 'array', 'items': {'type': 'string'}, 'description': 'Grant or award numbers'}}, 'description': 'Funding assertion', 'additionalProperties': False}, 'description': 'Funding acknowledgements'}, 'subject': {'type': 'array', 'items': {'type': 'string'}, 'description': 'Subject classification terms'}, 'abstract': {'type': 'string', 'description': 'Abstract when deposited by the publisher. Many records lack abstracts. Publishers deposit it as JATS XML, so this is the text of that deposit with markup removed and character references decoded; a link keeps its tag only where its href holds an address the text it wraps does not already carry, and each formula appears once â\x80\x94 MathML as the TeX annotation it carries, otherwise written out linearly (x_i, A^{â\x88\x921}, â\x88\x9a(m), (a+b)/c), and TeX deposited beside MathML in whichever notation comes first.'}, 'language': {'type': 'string', 'description': 'Language code (ISO 639)'}, 'licenses': {'type': 'array', 'items': {'type': 'object', 'required': ['url'], 'properties': {'url': {'type': 'string', 'description': 'License URL'}, 'delayInDays': {'type': 'number', 'description': 'Embargo delay in days from publication date'}, 'contentVersion': {'type': 'string', 'description': 'Content version (vor, am, tdm, unspecified)'}}, 'description': 'License entry', 'additionalProperties': False}, 'description': 'License terms'}, 'subtitle': {'type': 'string', 'description': 'Subtitle when present'}, 'updateTo': {'type': 'array', 'items': {'type': 'object', 'required': ['doi', 'type', 'source'], 'properties': {'doi': {'type': 'string', 'description': "DOI on the other side of the link: the notice, in updatedBy; the updated work, in updateTo. It is this work's own DOI when the update was made to this record in place."}, 'type': {'type': 'string', 'description': 'Crossref update type as deposited: correction, erratum, corrigendum, addendum, retraction, withdrawal, expression_of_concern, new_version, new_edition, or another code'}, 'source': {'type': 'string', 'description': 'Who recorded the link: publisher, or retraction-watch for an entry Crossref carries from the Retraction Watch database'}, 'updated': {'type': 'object', 'properties': {'day': {'type': 'number', 'description': 'Day of month'}, 'year': {'type': 'number', 'description': 'Year'}, 'month': {'type': 'number', 'description': 'Month (1â\x80\x9312)'}}, 'description': 'Date the update was issued', 'additionalProperties': False}, 'recordId': {'type': 'string', 'description': 'Retraction Watch record ID. Present only on retraction-watch entries.'}}, 'description': 'Update link', 'additionalProperties': False}, 'description': 'Works this record is an update notice for, in the entry shape updatedBy uses and in deposited order. Omitted when the record is not registered as a notice.'}, 'published': {'type': 'object', 'properties': {'day': {'type': 'number', 'description': 'Day of month'}, 'year': {'type': 'number', 'description': 'Year'}, 'month': {'type': 'number', 'description': 'Month (1â\x80\x9312)'}}, 'description': 'Publication date â\x80\x94 the first of published, published-print, published-online, and issued that names one. A component Crossref records as unknown is omitted, and so is every component below it.', 'additionalProperties': False}, 'publisher': {'type': 'string', 'description': 'Publisher name'}, 'relations': {'type': 'array', 'items': {'type': 'object', 'required': ['type', 'idType', 'assertedBy', 'ids'], 'properties': {'ids': {'type': 'array', 'items': {'type': 'string'}, 'description': 'Related identifiers in deposited order. A DOI resolves through crossref_get_work only when Crossref registered it; one registered with another agency, such as DataCite, returns doi_not_found there.'}, 'type': {'type': 'string', 'description': 'Relation type as deposited, read from this work toward ids: is-preprint-of, has-preprint, is-version-of, has-version, has-review, is-supplemented-by, references, has-part, and others'}, 'idType': {'type': 'string', 'description': 'Identifier scheme of ids: doi, uri, pmid, arxiv, accession, issn, isbn, or other'}, 'assertedBy': {'type': 'string', 'description': "Whose deposit asserts the relation: subject (this work's depositor) or object (the related record's depositor, whose assertion Crossref shows here inverted)"}}, 'description': 'Related identifiers sharing one relation type, identifier type, and asserting party', 'additionalProperties': False}, 'description': "Related identifiers â\x80\x94 preprints and published versions, other versions, reviews, supplements, parts â\x80\x94 grouped by relation type, identifier type, and asserting party, groups in Crossref's order and ids in deposited order. Returned whole. Omitted when the record deposits none."}, 'truncated': {'type': 'boolean', 'description': 'True when authors remain beyond this page. Absent when the page is the last.'}, 'updatedBy': {'type': 'array', 'items': {'type': 'object', 'required': ['doi', 'type', 'source'], 'properties': {'doi': {'type': 'string', 'description': "DOI on the other side of the link: the notice, in updatedBy; the updated work, in updateTo. It is this work's own DOI when the update was made to this record in place."}, 'type': {'type': 'string', 'description': 'Crossref update type as deposited: correction, erratum, corrigendum, addendum, retraction, withdrawal, expression_of_concern, new_version, new_edition, or another code'}, 'source': {'type': 'string', 'description': 'Who recorded the link: publisher, or retraction-watch for an entry Crossref carries from the Retraction Watch database'}, 'updated': {'type': 'object', 'properties': {'day': {'type': 'number', 'description': 'Day of month'}, 'year': {'type': 'number', 'description': 'Year'}, 'month': {'type': 'number', 'description': 'Month (1â\x80\x9312)'}}, 'description': 'Date the update was issued', 'additionalProperties': False}, 'recordId': {'type': 'string', 'description': 'Retraction Watch record ID. Present only on retraction-watch entries.'}}, 'description': 'Update link', 'additionalProperties': False}, 'description': 'Update notices Crossref records against this work â\x80\x94 corrections, errata, retractions, expressions of concern, withdrawals, new versions â\x80\x94 in deposited order. Entries are never merged: the same notice DOI can appear once per source, typed differently by each. Omitted when none is recorded, which does not mean the work was never updated: coverage depends on publisher and Retraction Watch deposits.'}, 'nextOffset': {'type': 'number', 'description': 'Offset to pass in the next call to retrieve the following page of authors. Absent when this page reaches the end of the author list.'}, 'authorCount': {'type': 'number', 'description': 'Total number of authors in the deposited list, before offset and limit were applied. Omitted alongside authors when the record deposits no author field.'}, 'articleNumber': {'type': 'string', 'description': 'Article number, deposited by journals that number articles instead of paging them'}, 'containerTitle': {'type': 'string', 'description': 'Journal, book, or proceedings name containing this work'}, 'referencesCount': {'type': 'number', 'description': 'Number of outgoing references (works cited by this paper)'}, 'isReferencedByCount': {'type': 'number', 'description': 'Incoming citation count from Crossref â\x80\x94 the count of works citing this DOI'}}, 'additionalProperties': False}

{'type': 'object', '$schema': 'https://json-schema.org/draft/2020-12/schema', 'properties': {'rows': {'type': 'integer', 'default': 10, 'maximum': 100, 'minimum': 1, 'description': 'Maximum funders to return for name queries, or works when include_works is true (1â\x80\x93100, default 10)'}, 'query': {'type': 'string', 'description': 'Funder name search query, e.g. "National Science Foundation" or "Wellcome Trust"'}, 'offset': {'type': 'integer', 'default': 0, 'maximum': 9007199254740991, 'minimum': 0, 'description': 'Zero-based offset into the name-query funder list. Pass the nextOffset value from the previous response to continue. Ignored when funder_doi is set, which resolves exactly one record.'}, 'funder_doi': {'anyOf': [{'type': 'string', 'const': ''}, {'type': 'string', 'pattern': '^(?:(?:https?:\\/\\/(?:dx\\.)?doi\\.org\\/|doi:)?10\\.13039\\/)?\\d+$', 'description': 'Funder registry ID or funder DOI, e.g. "100000001"'}], 'description': 'Funder DOI for exact lookup â\x80\x94 the full DOI "10.13039/100000001" (NSF) or the bare registry ID "100000001". Supersedes query when provided.'}, 'works_cursor': {'type': 'string', 'description': 'Cursor token for deep paging of the funded-works list when include_works is true. Pass "*" to start the walk at the most recently registered work, then pass the nextWorksCursor value from each response. A walk runs by the date each DOI was registered with Crossref, newest first, not by publication date â\x80\x94 Crossref does not walk a publication-date sort by cursor. Has no offset ceiling and cannot be combined with works_offset.'}, 'works_offset': {'type': 'integer', 'default': 0, 'maximum': 9007199254740991, 'minimum': 0, 'description': 'Zero-based offset into the funded-works list when include_works is true. Pass the nextWorksOffset value from the previous response to continue. Capped at works_offset + rows = 10000; use works_cursor to read the whole list. Cannot be combined with works_cursor.'}, 'include_works': {'type': 'boolean', 'default': False, 'description': 'When true, also return a page of works funded by the matched funder. Requires an unambiguous funder â\x80\x94 pass funder_doi when a name query matches more than one.'}}, 'additionalProperties': False}

{'type': 'object', 'anyOf': [{'not': {'required': ['error']}, 'required': ['funders', 'funderCount', 'fundersTotal']}, {'required': ['error']}], '$schema': 'https://json-schema.org/draft/2020-12/schema', 'properties': {'error': {'type': 'object', 'required': ['code', 'message'], 'properties': {'code': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': -9007199254740991, 'description': 'JSON-RPC error code for this failure.'}, 'data': {'type': 'object', 'properties': {'reason': {'type': 'string', 'examples': ['rate_limited', 'upstream_unavailable', 'malformed_response', 'request_timeout', 'invalid_cursor', 'invalid_parameter', 'funder_not_found', 'ambiguous_funder', 'offset_too_large', 'works_offset_too_large', 'works_cursor_offset_conflict'], 'description': 'Machine-readable failure mode. Declared by this tool: `rate_limited`: Crossref answered HTTP 429 and the limit did not clear inside the retry budget. `upstream_unavailable`: Crossref was unreachable, returned a 5xx status, or served an HTML error page instead of JSON. `malformed_response`: Crossref returned HTTP 200 with a body that is not valid JSON. `request_timeout`: Crossref did not respond within CROSSREF_TIMEOUT_MS, or answered HTTP 408/504. `invalid_cursor`: Crossref did not recognize the cursor token (HTTP 404 cursor-invalid). `invalid_parameter`: Crossref rejected a parameter value (a filter value of the wrong type or form), or answered HTTP 400 with a body that did not parse. `funder_not_found`: Funder DOI lookup returned 404 â\x80\x94 funder is not in the Crossref Funder Registry. `ambiguous_funder`: include_works is true but the name query matched more than one funder, making the target ambiguous. `offset_too_large`: offset + rows exceeds the 100000-record ceiling Crossref allows on funder name search. `works_offset_too_large`: works_offset + rows exceeds the 10000-record ceiling Crossref allows on a funded-works list. `works_cursor_offset_conflict`: include_works is true and works_cursor was supplied alongside a works_offset above zero. Other values are possible when a failure originates below the handler.'}, 'recovery': {'type': 'object', 'required': ['hint'], 'properties': {'hint': {'type': 'string'}}, 'description': 'Actionable next step for the caller.', 'additionalProperties': {}}, 'retryable': {'type': 'boolean', 'description': 'Whether retrying may succeed.'}}, 'additionalProperties': {}}, 'message': {'type': 'string', 'description': 'Human-readable description of what went wrong.'}}, 'description': 'Present when the call failed. Absent on success.', 'additionalProperties': {}}, 'notice': {'type': 'string', 'description': 'Guidance on a page that needs a caveat: a query nothing matched, an offset or works_offset past the end of a list that did match, a page that stops at one of the route offset ceilings with records still unretrieved, a returned funder that the Funder Registry has deprecated in favor of another entry, or a query or funder_doi supplied blank with nothing else to search by, so the page lists every funder unfiltered. Absent otherwise. A page needing more than one caveat carries them all in this one string.'}, 'funders': {'type': 'array', 'items': {'type': 'object', 'properties': {'id': {'type': 'string', 'description': 'Funder registry ID'}, 'uri': {'type': 'string', 'description': 'Funder registry URI'}, 'name': {'type': 'string', 'description': 'Funder canonical name'}, 'country': {'type': 'string', 'description': 'Free-text place the registry records for this funder. Usually a country name, but supranational entries carry values like "European Union" â\x80\x94 there is no machine-readable country code on the record.'}, 'altNames': {'type': 'array', 'items': {'type': 'string'}, 'description': 'Alternate names for this funder'}, 'replaces': {'type': 'array', 'items': {'type': 'string'}, 'description': 'Registry IDs this funder supersedes. Present only when the funder has absorbed a deprecated entry; works registered against those IDs are not counted here.'}, 'replacedBy': {'type': 'array', 'items': {'type': 'string'}, 'description': 'Registry IDs that supersede this funder. Present only on a deprecated entry â\x80\x94 a deprecated funder carries a fraction of its successor\'s works, so re-run with funder_doi set to one of these IDs to reach the current entry. Pass a bare ID ("501100004543") or the full DOI.'}, 'worksCount': {'type': 'number', 'description': 'Number of works associated with this funder in Crossref'}}, 'description': 'Funder record', 'additionalProperties': False}, 'description': 'Matching funder records'}, 'nextOffset': {'type': 'number', 'description': 'Value to pass as offset on the next call for the following page of funders. Absent when this page ends the matches or the next page would breach the 100000-record offset ceiling.'}, 'fundedWorks': {'type': 'array', 'items': {'type': 'object', 'required': ['doi'], 'properties': {'doi': {'type': 'string', 'description': 'Work DOI'}, 'type': {'type': 'string', 'description': 'Work type'}, 'title': {'type': 'string', 'description': 'Work title'}, 'published': {'type': 'object', 'properties': {'year': {'type': 'number', 'description': 'Year'}, 'month': {'type': 'number', 'description': 'Month'}}, 'description': 'Publication date â\x80\x94 the first of published, published-print, and published-online that names one. A component Crossref records as unknown is omitted, and so is every component below it.', 'additionalProperties': False}, 'isReferencedByCount': {'type': 'number', 'description': 'Incoming citation count'}}, 'description': 'Work summary', 'additionalProperties': False}, 'description': 'Page of works funded by the matched funder, newest first â\x80\x94 by publication date on an offset page, by Crossref registration date on a works_cursor page. Only present when include_works is true.'}, 'funderCount': {'type': 'number', 'description': 'Number of funder records returned in this page'}, 'fundersTotal': {'type': 'number', 'description': 'Total funder records matching the query in Crossref'}, 'nextWorksCursor': {'type': 'string', 'description': 'Value to pass as works_cursor on the next call for the following page of funded works. Present only on a page requested with works_cursor, and absent once the walk reaches the end of the works list.'}, 'nextWorksOffset': {'type': 'number', 'description': 'Value to pass as works_offset on the next call for the following page of funded works. Absent when this page ends the works list, the next page would breach the 10000-record offset ceiling, or the page was requested with works_cursor.'}, 'fundedWorksTotal': {'type': 'number', 'description': 'Total count of funded works for the matched funder, when include_works is true'}}, 'additionalProperties': False}

{'type': 'object', '$schema': 'https://json-schema.org/draft/2020-12/schema', 'properties': {'issn': {'anyOf': [{'type': 'string', 'const': ''}, {'type': 'string', 'pattern': '^\\d{4}-?\\d{3}[\\dX]$', 'description': 'ISSN, e.g. "1234-5678"'}], 'description': 'ISSN for exact single-journal lookup (print or electronic, with or without hyphen). Example: "1234-5678".'}, 'rows': {'type': 'integer', 'default': 10, 'maximum': 100, 'minimum': 1, 'description': 'Maximum number of journals to return for title queries, or works when include_works is true (1â\x80\x93100, default 10)'}, 'query': {'type': 'string', 'description': 'Journal title search query, e.g. "Nature" or "Journal of Machine Learning Research"'}, 'offset': {'type': 'integer', 'default': 0, 'maximum': 9007199254740991, 'minimum': 0, 'description': 'Zero-based offset into the title-query journal list. Pass the nextOffset value from the previous response to continue. Ignored when issn is set, which resolves exactly one record.'}, 'works_cursor': {'type': 'string', 'description': 'Cursor token for deep paging of the journal works list when include_works is true. Pass "*" to start the walk at the most recently registered work, then pass the nextWorksCursor value from each response. A walk runs by the date each DOI was registered with Crossref, newest first, not by publication date â\x80\x94 Crossref does not walk a publication-date sort by cursor. Has no offset ceiling and cannot be combined with works_offset.'}, 'works_offset': {'type': 'integer', 'default': 0, 'maximum': 9007199254740991, 'minimum': 0, 'description': 'Zero-based offset into the journal works list when include_works is true. Pass the nextWorksOffset value from the previous response to continue. Capped at works_offset + rows = 10000; use works_cursor to read the whole list. Cannot be combined with works_cursor.'}, 'include_works': {'type': 'boolean', 'default': False, 'description': "When true, also return a page of the journal's most recent works â\x80\x94 newest published first on an offset page, newest registered first on a works_cursor walk. Requires an unambiguous journal â\x80\x94 pass issn when a title query matches more than one. A journal with no ISSN registered has no addressable works list; the works lookup is then skipped and the notice enrichment says so."}}, 'additionalProperties': False}

{'type': 'object', 'anyOf': [{'not': {'required': ['error']}, 'required': ['journals', 'journalCount', 'journalsTotal']}, {'required': ['error']}], '$schema': 'https://json-schema.org/draft/2020-12/schema', 'properties': {'error': {'type': 'object', 'required': ['code', 'message'], 'properties': {'code': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': -9007199254740991, 'description': 'JSON-RPC error code for this failure.'}, 'data': {'type': 'object', 'properties': {'reason': {'type': 'string', 'examples': ['rate_limited', 'upstream_unavailable', 'malformed_response', 'request_timeout', 'invalid_cursor', 'invalid_parameter', 'issn_not_found', 'ambiguous_journal', 'offset_too_large', 'works_offset_too_large', 'works_cursor_offset_conflict'], 'description': 'Machine-readable failure mode. Declared by this tool: `rate_limited`: Crossref answered HTTP 429 and the limit did not clear inside the retry budget. `upstream_unavailable`: Crossref was unreachable, returned a 5xx status, or served an HTML error page instead of JSON. `malformed_response`: Crossref returned HTTP 200 with a body that is not valid JSON. `request_timeout`: Crossref did not respond within CROSSREF_TIMEOUT_MS, or answered HTTP 408/504. `invalid_cursor`: Crossref did not recognize the cursor token (HTTP 404 cursor-invalid). `invalid_parameter`: Crossref rejected a parameter value (a filter value of the wrong type or form), or answered HTTP 400 with a body that did not parse. `issn_not_found`: ISSN lookup returned 404 â\x80\x94 ISSN is not registered in Crossref. `ambiguous_journal`: include_works is true but the title query matched more than one journal, making the target ambiguous. `offset_too_large`: offset + rows exceeds the 100000-record ceiling Crossref allows on journal title search. `works_offset_too_large`: works_offset + rows exceeds the 10000-record ceiling Crossref allows on a journal works list. `works_cursor_offset_conflict`: include_works is true and works_cursor was supplied alongside a works_offset above zero. Other values are possible when a failure originates below the handler.'}, 'recovery': {'type': 'object', 'required': ['hint'], 'properties': {'hint': {'type': 'string'}}, 'description': 'Actionable next step for the caller.', 'additionalProperties': {}}, 'retryable': {'type': 'boolean', 'description': 'Whether retrying may succeed.'}}, 'additionalProperties': {}}, 'message': {'type': 'string', 'description': 'Human-readable description of what went wrong.'}}, 'description': 'Present when the call failed. Absent on success.', 'additionalProperties': {}}, 'notice': {'type': 'string', 'description': 'Guidance on a page that needs a caveat: a query nothing matched, an offset or works_offset past the end of a list that did match, a page that stops at one of the route offset ceilings with records still unretrieved, an include_works request that was skipped because the matched journal has no registered ISSN to address its works list by, or a query or issn supplied blank with nothing else to search by, so the page lists every journal unfiltered. Absent otherwise. A page needing more than one caveat carries them all in this one string.'}, 'journals': {'type': 'array', 'items': {'type': 'object', 'properties': {'issn': {'type': 'array', 'items': {'type': 'string'}, 'description': 'All ISSN variants for this journal'}, 'issnL': {'type': 'string', 'description': 'Linking ISSN (ISSN-L). Absent when the journal has no linking ISSN registered â\x80\x94 Crossref reports that as an explicit null rather than an omitted key.'}, 'title': {'type': 'string', 'description': 'Journal title'}, 'subjects': {'type': 'array', 'items': {'type': 'object', 'required': ['name'], 'properties': {'name': {'type': 'string', 'description': 'Subject area name'}}, 'description': 'Subject', 'additionalProperties': False}, 'description': 'Subject classifications'}, 'publisher': {'type': 'string', 'description': 'Publisher name'}, 'totalDois': {'type': 'number', 'description': 'Total registered DOIs in this journal'}}, 'description': 'Journal record', 'additionalProperties': False}, 'description': 'Matching journal records'}, 'nextOffset': {'type': 'number', 'description': 'Value to pass as offset on the next call for the following page of journals. Absent when this page ends the matches or the next page would breach the 100000-record offset ceiling.'}, 'worksTotal': {'type': 'number', 'description': 'Total works count for the journal, when include_works is true'}, 'recentWorks': {'type': 'array', 'items': {'type': 'object', 'required': ['doi'], 'properties': {'doi': {'type': 'string', 'description': 'Work DOI'}, 'type': {'type': 'string', 'description': 'Work type'}, 'title': {'type': 'string', 'description': 'Work title'}, 'published': {'type': 'object', 'properties': {'year': {'type': 'number', 'description': 'Year'}, 'month': {'type': 'number', 'description': 'Month'}}, 'description': 'Publication date â\x80\x94 the first of published, published-print, and published-online that names one. A component Crossref records as unknown is omitted, and so is every component below it.', 'additionalProperties': False}, 'isReferencedByCount': {'type': 'number', 'description': 'Incoming citation count'}}, 'description': 'Work summary', 'additionalProperties': False}, 'description': 'Page of works from the matched journal, newest first â\x80\x94 by publication date on an offset page, by Crossref registration date on a works_cursor page. Requires include_works, and absent even then when the matched journal has no registered ISSN â\x80\x94 the works list is addressable by ISSN alone, and the notice enrichment says so.'}, 'journalCount': {'type': 'number', 'description': 'Number of journal records returned in this page'}, 'journalsTotal': {'type': 'number', 'description': 'Total journal records matching the query in Crossref'}, 'nextWorksCursor': {'type': 'string', 'description': 'Value to pass as works_cursor on the next call for the following page of works. Present only on a page requested with works_cursor, and absent once the walk reaches the end of the works list.'}, 'nextWorksOffset': {'type': 'number', 'description': 'Value to pass as works_offset on the next call for the following page of works. Absent when this page ends the works list, the next page would breach the 10000-record offset ceiling, or the page was requested with works_cursor.'}}, 'additionalProperties': False}

{'type': 'object', '$schema': 'https://json-schema.org/draft/2020-12/schema', 'properties': {'rows': {'type': 'integer', 'default': 20, 'maximum': 100, 'minimum': 1, 'description': 'Number of results to return per page (1â\x80\x93100, default 20)'}, 'sort': {'anyOf': [{'type': 'string', 'const': ''}, {'enum': ['relevance', 'score', 'is-referenced-by-count', 'published', 'published-print', 'published-online', 'deposited', 'indexed', 'created', 'updated', 'references-count'], 'type': 'string', 'description': 'Crossref sort field'}], 'description': 'Sort field. The publication-date sorts (published, published-print, published-online) work with offset paging only â\x80\x94 Crossref refuses them alongside cursor; every other sort works with either.'}, 'order': {'anyOf': [{'type': 'string', 'const': ''}, {'enum': ['asc', 'desc'], 'type': 'string', 'description': 'Sort direction'}], 'description': 'Sort direction (asc or desc)'}, 'query': {'type': 'string', 'description': 'Free-text search query, e.g. "CRISPR gene editing" or "climate change adaptation"'}, 'cursor': {'type': 'string', 'description': 'Cursor token for deep paging. Pass "*" to start cursor-based paging (required past ~10K results), then pass the nextCursor value from each response until a response omits it, which means the list is exhausted. Cannot be combined with offset, or with a publication-date sort (published, published-print, published-online), which Crossref does not walk by cursor.'}, 'fields': {'type': 'array', 'items': {'enum': ['DOI', 'title', 'type', 'author', 'published', 'published-print', 'published-online', 'container-title', 'publisher', 'is-referenced-by-count', 'score', 'abstract', 'volume', 'issue', 'page', 'article-number', 'ISSN'], 'type': 'string', 'description': 'Crossref select name'}, 'description': 'Fields to return (reduces payload). Names are case-sensitive, and each fills one output field: DOI â\x86\x92 doi, title â\x86\x92 title, type â\x86\x92 type, author â\x86\x92 authors and authorCount, published / published-print / published-online â\x86\x92 published, container-title â\x86\x92 containerTitle, publisher â\x86\x92 publisher, is-referenced-by-count â\x86\x92 isReferencedByCount, score â\x86\x92 score, abstract â\x86\x92 abstract, volume â\x86\x92 volume, issue â\x86\x92 issue, page â\x86\x92 page, article-number â\x86\x92 articleNumber, ISSN â\x86\x92 issn. A selected field absent from a work means the record does not deposit it. DOI is always returned whether or not it is listed here, so every result stays resolvable by crossref_get_work, which also returns the fields this list does not cover (license, funder, references, and the rest of the record).'}, 'filter': {'type': 'object', 'description': 'Structured filter object using Crossref hyphen-separated keys. All values must be strings. Boolean flag keys (has-abstract, has-references, has-full-text) require string values "true" or "false". Example: {"type":"journal-article","has-abstract":"true","from-pub-date":"2023-01-01"}', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'type': 'string'}}, 'offset': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0, 'description': 'Zero-based result offset for offset-based paging. Cannot be used with cursor. Capped at ~10K; use cursor for deeper paging.'}, 'queryTitle': {'type': 'string', 'description': 'Match against work titles only, e.g. "Array programming with NumPy".'}, 'authorLimit': {'type': 'integer', 'default': 25, 'maximum': 500, 'minimum': 1, 'description': 'Maximum number of authors to return per work (1â\x80\x93500, default 25). Ordinary records fit under the default; large-collaboration papers deposit thousands, and a page of them is large enough to exhaust a client context. Each work reports its full deposited total as authorCount â\x80\x94 call crossref_get_work with that work doi to page the authors this cap left out.'}, 'queryAuthor': {'type': 'string', 'description': 'Match against author names only, e.g. "Charles R. Harris".'}, 'queryBibliographic': {'type': 'string', 'description': 'Whole-citation match to resolve a known reference to its DOI. Combine title, author, year, and container into one string, e.g. "Watson Crick molecular structure of nucleic acids Nature 1953".'}, 'queryContainerTitle': {'type': 'string', 'description': 'Match against the container title (journal or book name) only, e.g. "Nature".'}}, 'additionalProperties': False}

{'type': 'object', 'anyOf': [{'not': {'required': ['error']}, 'required': ['works', 'totalResults', 'returned']}, {'required': ['error']}], '$schema': 'https://json-schema.org/draft/2020-12/schema', 'properties': {'cap': {'type': 'number', 'description': 'The per-work author cap applied to this page. Absent when no list was cut.'}, 'error': {'type': 'object', 'required': ['code', 'message'], 'properties': {'code': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': -9007199254740991, 'description': 'JSON-RPC error code for this failure.'}, 'data': {'type': 'object', 'properties': {'reason': {'type': 'string', 'examples': ['rate_limited', 'upstream_unavailable', 'malformed_response', 'request_timeout', 'unknown_filter', 'sort_cursor_conflict', 'invalid_cursor', 'invalid_parameter', 'cursor_offset_conflict', 'offset_too_large'], 'description': 'Machine-readable failure mode. Declared by this tool: `rate_limited`: Crossref answered HTTP 429 and the limit did not clear inside the retry budget. `upstream_unavailable`: Crossref was unreachable, returned a 5xx status, or served an HTML error page instead of JSON. `malformed_response`: Crossref returned HTTP 200 with a body that is not valid JSON. `request_timeout`: Crossref did not respond within CROSSREF_TIMEOUT_MS, or answered HTTP 408/504. `unknown_filter`: Crossref rejected a filter key it does not recognize (filter-not-available). `sort_cursor_conflict`: A publication-date sort (published, published-print, published-online) was combined with cursor paging, which Crossref refuses. `invalid_cursor`: Crossref did not recognize the cursor token (HTTP 404 cursor-invalid). `invalid_parameter`: Crossref rejected a parameter value (a filter value of the wrong type or form), or answered HTTP 400 with a body that did not parse. `cursor_offset_conflict`: Both cursor and offset were supplied in the same request. `offset_too_large`: The requested offset exceeds the ~10K Crossref limit for offset-based paging. Other values are possible when a failure originates below the handler.'}, 'recovery': {'type': 'object', 'required': ['hint'], 'properties': {'hint': {'type': 'string'}}, 'description': 'Actionable next step for the caller.', 'additionalProperties': {}}, 'retryable': {'type': 'boolean', 'description': 'Whether retrying may succeed.'}}, 'additionalProperties': {}}, 'message': {'type': 'string', 'description': 'Human-readable description of what went wrong.'}}, 'description': 'Present when the call failed. Absent on success.', 'additionalProperties': {}}, 'works': {'type': 'array', 'items': {'type': 'object', 'required': ['doi'], 'properties': {'doi': {'type': 'string', 'description': 'Canonical DOI'}, 'issn': {'type': 'array', 'items': {'type': 'string'}, 'description': 'ISSN(s) of the containing journal'}, 'page': {'type': 'string', 'description': 'Page range as deposited, e.g. "357-362"'}, 'type': {'type': 'string', 'description': 'Work type'}, 'issue': {'type': 'string', 'description': 'Issue of the container the work appears in'}, 'score': {'type': 'number', 'description': 'Relevance score assigned by Crossref'}, 'title': {'type': 'string', 'description': 'Work title'}, 'volume': {'type': 'string', 'description': 'Volume of the container the work appears in'}, 'authors': {'type': 'array', 'items': {'type': 'object', 'properties': {'name': {'type': 'string', 'description': 'Name when no given/family split is available'}, 'given': {'type': 'string', 'description': 'Given name'}, 'family': {'type': 'string', 'description': 'Family name'}}, 'description': 'Author', 'additionalProperties': False}, 'description': 'Author list for this work, capped at authorLimit. Omitted when the record deposits no author field.'}, 'abstract': {'type': 'string', 'description': 'Abstract when present in the indexed record â\x80\x94 the text of the publisherâ\x80\x99s JATS deposit, with markup removed and character references decoded; a link keeps its tag only where its href holds an address the text it wraps does not already carry, and each formula appears once â\x80\x94 MathML as the TeX annotation it carries, otherwise written out linearly (x_i, A^{â\x88\x921}, â\x88\x9a(m), (a+b)/c), and TeX deposited beside MathML in whichever notation comes first'}, 'published': {'type': 'object', 'properties': {'day': {'type': 'number', 'description': 'Day'}, 'year': {'type': 'number', 'description': 'Year'}, 'month': {'type': 'number', 'description': 'Month'}}, 'description': 'Publication date â\x80\x94 the first of published, published-print, and published-online that names one. A component Crossref records as unknown is omitted, and so is every component below it.', 'additionalProperties': False}, 'publisher': {'type': 'string', 'description': 'Publisher name'}, 'authorCount': {'type': 'number', 'description': 'Total number of authors deposited for this work, before the authorLimit cap. Greater than the length of authors when the cap cut the list; pass the doi of this work to crossref_get_work to page the whole list.'}, 'articleNumber': {'type': 'string', 'description': 'Article number, deposited by journals that number articles instead of paging them'}, 'containerTitle': {'type': 'string', 'description': 'Journal or container name'}, 'isReferencedByCount': {'type': 'number', 'description': 'Incoming citation count'}}, 'description': 'Work summary', 'additionalProperties': False}, 'description': 'Matching works. Empty when nothing matched the query, when an offset runs past the end of the results, or on the page that ends a cursor walk â\x80\x94 the notice enrichment says which.'}, 'notice': {'type': 'string', 'description': 'Guidance on an empty page, naming which of its three causes applies: a query nothing matched, an offset past the end of a list that did match, or a cursor walk that has reached the end of the list. On a page carrying records, present when authorLimit cut at least one work list, naming how many and the route to the rest, or when every query term and filter value was supplied blank, so the page lists the whole index unfiltered. A page needing more than one caveat carries them all in this one string.'}, 'returned': {'type': 'number', 'description': 'Number of records returned in this response'}, 'truncated': {'type': 'boolean', 'description': 'True when at least one work on this page had its author list cut by authorLimit. Absent when every work on the page carries its full deposited author list.'}, 'nextCursor': {'type': 'string', 'description': 'Cursor token to pass as cursor on the next call to continue a cursor walk. Present only on a page requested with cursor, and absent once the walk reaches the end of the list.'}, 'totalResults': {'type': 'number', 'description': 'Total matching records in Crossref'}}, 'additionalProperties': False}