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xsd.crossref.4.4.1.common4.4.1.xsd Maven / Gradle / Ivy




	
	
	
	

	
	
	
	
	
	
	
		
			
				
					
					
					
				
			
		
	
	
		
			
				
					
					
				
			
		
	
	
		
			
				
					
					
				
			
		
		
			
				
					
					
					
					
					
					
					
					
					
				
			
		
		
			
				
					
					
					
					
				
			
		
		
	
	
		
			Language attributes are based on ISO 639
		
		
			
				
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
				
			
		
	
	
		
			Mime types for component format. For mime types refer to
				http://www.iana.org/assignments/media-types/
		
		
			
				
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
                                        
                                        
                                        
					
					
					
                                        
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					
                                        
				
			
		
	
	
		
			Use to flag metadata for distribution. "query" is the default and
				follows current protocol - bibliographic metadata is distributed to anyone in a
				query response, bulk distribution is only allowed per CMS rules. "any" allows bulk
				distribution of metadata to anyone using OAI-PMH queries.
		
		
			
				
					
					
				
			
		
	
	
		
			Use to flag references for distribution. "none" is the default and
				follows current protocol - references are only distributed to everyone if the prefix
				level permission is set, otherwise reference distribution is limited to the DOI
				owner. Setting the value to "query" releases references to anyone making a query
				request (this overrides any established prefix level permission). Value "any" allows
				bulk distribution to anyone (using a CrossRef query account) using the OAI-PMH
				protocol, and also releases references to anyone making a query
				request.
		
		
			
				
					
					
					
				
			
		
	
	
	
		
			
		
	
	
		
			The following are basic data types for face markup. Face markup that
				appears in the title, subtitle, and original_language_title elements should be
				retained when depositing metadata. Face markup in other elements (e.g. small caps in
				author names) must be dropped. Face markup support includes bold (b), italic (i),
				underline (u), over-line (ovl), superscript (sup), subscript (sub), small caps
				(scp), and typewriter text (tt). See https://support.crossref.org/hc/en-us/articles/214532023
				
MathML may also be included using the 'mml' namespace prefix.
		
		
			
			
			
			
			
			
			
			
			
			
		
	
	
	
	
	
	
	
	
	
	
	
		
			The following are basic data types for date
				parts.
		
		
			
			
			
		
	
	
		
			
			
			
		
	
	
		
			
			
			
		
	
	
	
		
			Publisher generated ID that uniquely identifies the DOI submission
				batch. It will be used as a reference in error messages sent by the MDDB, and can be
				used for submission tracking. The publisher must insure that this number is unique
				for every submission to CrossRef. 
		
		
			
				
				
			
		
	
	
		
			Indicates version of a batch file instance or DOI. timestamp is used
				to uniquely identify batch files and DOI values when a DOI has been updated one or
				more times. timestamp is an integer representation of date and time that serves as a
				version number for the record that is being deposited. Because CrossRef uses it as a
				version number, the format need not follow any public standard and therefore the
				publisher can determine the internal format. The schema format is a double of at
				least 64 bits, insuring that a fully qualified date/time stamp of 19 digits can be
				submitted. When depositing data, CrossRef will check to see if a DOI has already
				been deposited for the specific doi value. If the newer data carries a time stamp
				value that is equal to or greater than the old data based on a strict numeric
				comparison, the new data will replace the old data. If the new data value is less
				than the old data value, the new data will not replace the old data. timestamp is
				optional in doi_data and required in head. The value from the head instance
				timestamp will be used for all instances of doi_data that do not include a timestamp
				element.
		
	
	
		
			Information about the organization submitting DOI metadata to
				CrossRef
		
		
			
				
				
			
		
	
	
		
			Name of the organization registering the DOIs. The name placed in
				this element should match the name under which a depositing organization has
				registered with CrossRef.
		
		
			
				
				
			
		
	
	
		
			e-mail address to which batch success and/or error messages are sent.
				It is recommended that this address be unique to a position within the organization
				submitting data (e.g. "doi@...") rather than unique to a person. In this way, the
				alias for delivery of this mail can be changed as responsibility for submission of
				DOI data within the organization changes from one person to another.
			
		
		
			
				
				
				
			
		
	
	
		
			The organization that owns the information being registered.
			
		
		
			
				
				
			
		
	
	
	
		
			The chapter, section, part, etc. number for a content item in a book.
				Unlike volume and edition_number, component_number should include any additional
				text that helps identify the type of component. In the example above, the text
				"Section 8" appeared on the table of contents and it is reflected here. "8" is also
				acceptable, however the former treatment is preferred. The type of the component is
				given the component_type attribute of content_item.
		
		
			
				
				
			
		
	
	
		
			The edition number of a book. edition_number should include only a
				number and not additional text such as "edition". For example, you should submit
				"3", not "third edition" or "3rd edition". Roman numerals are acceptable. Publishers
				will update a print edition with a new edition number when more than ten percent of
				the content has changed. However, publishers expect to continuously update online
				editions of books without changing the edition number. The ability to update the
					electronic version independent of the print version could be problematic for
					researchers. For example, if a research article cites the print version of a
					chapter, and a researcher subsequently links to the online version of the same
					chapter, the content may be different from the print version without the typical
					indication of a new edition. This topic requires further discussion outside of
					the scope of this specification.
		
		
			
				
				
			
		
	
	
	
		
			The issue number in which an article is published. Only one issue
				name should be used for the issue. The issue number takes precedence over any other
				name. For example, if an issue has only a seasonal name, then the season should be
				listed in issue. However, if an issue has a number and a season, then only the
				number should be listed in issue, and the season should be placed in month (see the
				table in month, below, for proper encoding of the season) if the specific month of
				publication is not known. Do not include the words "issue", "No" or "number" in this
				element. When submitting DOIs for journal articles published online ahead of print,
				you should submit the issue number, when known, even if the pagination information
				for the entity is not yet known. Data may be alpha, numeric or a combination.
				Examples: 74(3):1999 
					
						1999
					
					
						74
					
					3
				 Volume 74, Spring 1999 
					
						1999
					
					
						74
					
					Spring
				 Volume 74, issue 3 Spring 1999 
					
						21
						1999
					
					
						74
					
					3
				
		
		
			
				
				
			
		
	
	
	
		
			The container for elements related directly to a DOI. doi_data
				contains the doi, timestamp (version) and corresponding resource (URI) data for the
				doi. Cases of single-resolution (i.e. one DOI with a single corresponding URI)
				should be tagged with a doi/resource pair in doi_data. If additional resources are
				to be proved the <collection> element may also be used. The single URL
				provided in the <resource> is mandatory and serves as the single resolution
				target for the DOI. Note: A timestamp value placed inside doi_data will override any
				timestamp value placed in the <head> element. 
		
		
			
				
				
				
				
			
		
	
	
		
			The element that contains a URI associated with a DOI. URLs are
				referred to as resources in the 2.0 CrossRef schema because they can be any valid
				URI. Cases of single-resolution (i.e. one DOI with a single corresponding URI)
				should be tagged with a doi/resource pair in doi_data. Only one resource is allowed
				per doi_data, the exception being resource elements within a collection element.
				Values for the "content_version" attribute are vor (version of record) and am
				(advance manuscript). 
		
		
			
				
					
					
						
							
								
								
							
						
					
				
			
		
	

	
		
			
			
			
		
	

	
		
			 A collection is a container for one or more items each holding a doi
				or a resource (URI) which is related to the DOI in the ancestor <doi_data>
				element. A collection must be qualified by a property attibute or the
				multi-resolution attribute. property attributes: list-based: uses an interim page
				and presents the list of items to the user (via Multiple Resolution) country-based:
				proxy picks destination based on the country code of the user's location (this
				option is not currently active, contact [email protected] for more info)
				crawler-based: identifies resource to be crawled by the specified crawlers.
				text-mining: identifies resource to be used for text and data mining unspecified:
				identifies resource with unspecified usage syndication: identifies resource to be
				used for syndication The multi-resolution attribute may be used to lock or unlock
				DOIs for multiple resolution. 
		
		
			
				
			
			
				
					
						
						
						
						
						
						
					
				
			
			
				
					
						
						
					
				
			
		
	
	
		
			A container used to associate a collection, doi, or resource (URI)
				with zero or more property elements. item is currently used for supplying as-crawled
				URLs (https://support.crossref.org/hc/en-us/articles/214018806)
		
		
			
				
					
					
				
			
			
				
					
						
						
						
						
						
						
					
				
			
			
				
					
						
						
					
				
			
			
				
					
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
						
					
				
			
		
	

	
		
			
			
		
	
	
		
			property elements qualify the semantic meaning of a item or
				collection. property elements consist of a type/value pair where the property type
				is found in the type attribute and the value is found in the element content. The
				property element is not currently in use. 
		
		
			
				
					
				
			
		
	
	
		
			The container for all who contributed to authoring or editing an
				entity.
		
		
			
				
					
					
							
				
			
		
	
	
		
			
			
			
		
	
	
		
			The name of an organization (as opposed to a person) that contributed
				to authoring an entity. If multiple organizations authored an entity, each one
				should be captured in a unique organization element. If an entity was authored by
				individuals in addition to one or more organizations, person_name and organization
				may be freely intermixed within contributors. contributor_role should be set, as
				appropriate, to author or editor. When a contributor translated a work, set
				contributor_role to "translator". "chair" should only be used for conference
				proceedings to indicate a conference chair.
		
		
			
				
					
				
			
		
	
	
		
			The name of a person (as opposed to an organization) that contributed
				to authoring an entity. Authors with name suffixes should have the suffix captured
				in suffix, not in surname. Author prefixes such as "Dr.", "Prof.", or "President"
				should not be included in person_name or any other element. Author degrees (e.g.
				M.D., Ph.D.) also should not be included in CrossRef submissions. contributor_role
				should be set, as appropriate, to author or editor. When a contributor translated a
				work, set contributor_role to "translator". "chair" should only be used for
				conference proceedings to indicate a conference chair.
		
		
			
				
				
				
				
				
				
			
			
		
	


	
		
			 
		
		
			
				
			
			
		
		
	
	
	
		
			A contributor's given name. The given_name, combined with surname,
				forms the name of an author or editor. given_name may be submitted as either
				initials or a full name. Do not place given_name within the surname unless it is
				unclear how to distinguish the given name from the surname, as may be the case in
				non-Western names. Do not include titles such as "Dr.", "Prof.", or "President" in
				given_name. These titles should not be submitted to CrossRef.
		
		
			
				
				
				
				
			
		
	
	
		
			The surname of an author or editor. The surname, combined with
				given_name, forms the name of an author or editor. Whenever possible, the given name
				should not be included in the surname element. In cases where the given name is not
				clear, as may happen with non-Western names or some societies in which surnames are
				not distinguished, you may place the entire name in surname, e.g.: Leonardo
					da Vinci If an author is an organization, you should use organization,
				not surname. Suffixes should be tagged with suffix. Author degrees (e.g. M.D.,
				Ph.D.) should not be included in CrossRef submissions.
		
		
			
				
				
				
				
			
		
	
	
		
			The suffix of an author name, e.g. junior or senior. A name suffix,
				that typically denotes a generation distinction, is tagged with suffix. Author
				degrees (e.g. M.D., Ph.D.) should not be included in CrossRef
				submissions.
		
		
			
				
				
			
		
	
	
		
						
		
	
	
	
		
			The ORCID for an author. The schema performs basic pattern validation, checksum validation is performed upon deposit via a system check.
		
		
			
				
					
				
			
		
	

	
		
			 The institution(s) with which a contributor is affiliated. This
				element may hold the name and location of an affiliation with which a contributor is
				affiliated. Please note the following points when using this element: 1. A
				contributor may have up to five affiliations. Each affiliation should be in a unique
				<affiliation> element. The following is correct: <affiliation>University
				of New Mexico</affiliation> <affiliation>Sandia National
				Laboratories</affiliation> The following is NOT correct
				<affiliation>University of New Mexico; Sandia National
				Laboratories</affiliation> 2. The name of the institution is required in this
				element. The location is optional. Both of the following are correct:
				<affiliation>Harvard University</affiliation> <affiliation>Harvard
				University, Cambridge, MA</affiliation> 3. Additional address information such
				as a URL or email address should NOT be deposited in this element 4. Visual linking
				indicators used in publication to connect authors with their affiliations such as
				footnote symbols or initials should NOT be included in the <affiliation>
				element 5. If you have only a single string that has the affiliation for multiple
				contributors to a work and that string is not broken out into the individual
				affliations for each author, please do NOT deposit the affilation information. This
				element is to be used only for affiliation information that is directly connected to
				the author with whom this information is included within the person_name element.
			
		
		
			
				
				
			
		
	
	
		
			
				
				
			
		
	
	
		
			
				
					
						
						
					
					
				
				
				
			
			
			
				
					
						
						
						
						
					
				
			
			
			
			
		
	
	
		
			
				
				
				
				
				
			
			
			
				
					
						
						
						
						
					
				
			
			
			
		
	
	
		
			
			
			
		
	
	
		
			
			
			
		
	

	



	
		
			A container for the title and original language title
				elements.
		
		
			
				
					
					
				
				
					
					
				
			
		
	
	
		
			The title of the entity being registered. When a title contains a
				subtitle, it is preferable to capture the subtitle portion in the subtitle element.
				Only minimal face markup is supported, see https://support.crossref.org/hc/en-us/articles/214532023
		
		
			
				
			
		
	
	
		
			The title of an entity in its original language if the registration
				is for a translation of a work. When providing the original language of a title, you
				should set the language attribute.
		
		
			
				

			
			
		
	
	
		
			The sub-title portion of an entity title. When possible, it is better
				to tag a title and subtitle with separate elements. If this information is not
				available, it is acceptable to submit the title and subtitle all within the title
				element with punctuation (preferably a colon) used to separate the subtitle from the
				title. When a subtitle is tagged, the space and punctuation between the title and
				subtitle text should not be included. The following examples illustrate correct and
				incorrect tagging practices: Correct and optimal tagging: The Human
					Brain
				A Handbook Correct but not optimal tagging: The Human
					Brain: A Handbook Incorrect: The Human Brain: 
				A Handbook
				The Human Brain
				: A Handbook
		
		
			
				

			
		
	
	
		
			Month of publication. The month must be expressed in numeric format
				rather spelling out the name (e.g.. submit "10", not "October"). The month must be
				expressed with a leading zero if it is less than 10 (e.g. submit "05", not "5").
				When a journal issue has both an issue number and a season, the issue number should
				be placed in issue. If the month of publication is not known, the season should be
				placed in month as a two-digit value as follows: Season Value Spring 21 Summer 22
				Autumn 23 Winter 24 First Quarter 31 Second Quarter 32 Third Quarter 33 Fourth
				Quarter 34 In cases when an issue covers multiple months, e.g. "March-April",
				include only the digits for the first month of the range.
		
	
	
	
	
	
		
			Day of publication. The should must be expressed with a leading zero
				if it is less than 10 (e.g. submit "05", not "5").
		
	
	
		
			Year of publication.
		
	
	
		
			database_date records key dates in the life of a database or dataset item.
				
				Within database_date, creation_date is the date the item was first created, publication_date is the date the item was first published, and update_date is the date the item was last updated.
		
		
			
				
				
				
			
		
	
	
		
			The date a database or dataset item was created.
		
		
			
				
			
		
	
	
	
		
			The date a content item was created.
		
		
			
				
			
		
	
	
	
		
			The date a pre-print was posted to a repository.
		
		
			
				
			
		
	
	
	
		
			The date a manuscript was accepted for publication.
		
		
			
				
			
		
	
	
	
		
			The date a database or dataset item was updated.
		
		
			
				
			
		
	
	
	
		
			The date of publication. In all cases, multiple dates are allowed to
				allow for different dates of publication for online and print versions. This element
				was previously called date, but was renamed publication_date to distinguish more
				clearly from conference_date.
		
		
			
				
			
		
	
	
		
			
			
			
		
		
			
				
					
					
					
				
			
		
	
	
	
	
		
			The date a review was published to a repository.
		
		
			
				
				
				
			
		
	
	
	
	
	
		
			The container for information about page ranges. When an entity has
				non-contiguous page information, you should capture the first page range in
				first_page and last_page. Any additional page information should be captured in
				other_pages. Punctuation is only allowed in other_pages. It should not appear in
				first_page and last_page. Page number letter prefixes or suffixes should be
				included. Roman numeral pages are permitted in both upper case and lower case. Data
				may be alpha, numeric or a combination.
		
		
			
				
				
				
			
		
	
	
		
			First page number where an entity is located. Data may be alpha,
				numeric or a combination.
		
		
			
				
				
			
		
	
	
		
			The last page number of an entity. last_page should not be used when
				the last page number is the same as the first page number (i.e. when the entire
				entity fits on one page). Do not include punctuation for a page range in last_page.
				If the entity has non-contiguous paging, use last_page for the last page of the
				first range and place all other page information into other_pages. Data may be
				alpha, numeric or a combination.
		
		
			
				
				
			
		
	
	
		
			Used to capture additional page information when items do not
				encompass contiguous page ranges. When an entity has non-contiguous page
				information, you should capture the first page range in first_page and last_page.
				Any additional page information should be captured in other_pages. You should
				include commas or hyphens to express discrete pages or page ranges. endash entities
				should be converted to ASCII hyphens. Spaces should not be included. Note that
				punctuation should never appear in first_page and last_page. Data may be alpha,
				numeric or a combination.
		
		
			
				
				
			
		
	
	
		
			
			
		
	
	
		
			DOI for an entity being registered with CrossRef.  In 2008 CrossRef restricted DOI suffix 
				characters to the following: "a-z", "A-Z", "0-9" and "-._;()/" 
				
				Existing DOIs with suffix characters outside of the allowed set are still supported.  For additional
				information on DOI syntax, see https://support.crossref.org/hc/en-us/articles/214669823
		
		
			
		
	

	
	
		
			
			
			
		
	

	
		
			
			
			
			
			
			
			
			
			
			
			
			
		
	

	
		
			
			
		
	

	
		
			
			
		
	

	
		
			
			
		
	

	
		
			
			
		
	

	
		
			
			
		
	
	
		
			
			
			
		
	
	
		
			The ISBN assigned to an entity. If a multi-volume work has one ISBN
				per volume and a unique ISBN for the series, all may be registered. The ISBN for the
				series must be in series_metadata, and the ISBN for each volume in
				proceedings_metadata, or book_metadata, respectively. The text "ISBN" should not be
				included in the ISBN element in CrossRef submissions. Although not required, the
				ISBN number should retain spaces or hyphens that appear in the formatted number
				because they aid in human-readability. For more information, please see
				http://www.isbn.org/standards/home/isbn/international/hyphenation- instructions.asp
				or http://www.isbn.org.
		
		
			
				
					
				
			
		
	
	
		
			Identifies books or conference proceedings that have no ISBN
				assigned. In very limited cases a book may never have an ISBN, this is particularly
				true for older texts. Conference proceedings, however, may regularly have a volume
				number but no ISBN or volume title. 
		
		
			
				
					
						
						
						
					
				
			
		
	
	
	
		
			
			
			
		
	
	
		
			The ISSN assigned to an entity. The ISSN must consist of eight digits
				(where the last digit may be an X), or it must consist of eight digits in two groups
				of four with a hyphen between the two groups. Spaces or other delimiters should not
				be included in an ISSN. For more information, please see
				http://www.issn.org:8080/English/pub/getting- checking/checking or
				http://www.issn.org. The text "ISSN" should not be included in the issn element in
				CrossRef submissions. CrossRef validates all ISSNs supplied in deposits, only valid
				ISSNs will be accepted.
		
		
			
				
					
				
			
		
	
	
		
			The coden assigned to a journal or conference
				proceedings.
		
		
			
				
				
			
		
	
	
		
			The volume number of a published journal, or the number of a printed
				volume for a book or conference proceedings. A journal volume is contained in the
				journal_volume element to allow for the assignment of a DOI to an entire journal
				volume. Do not include the words "Volume" or "vol." in this element. Data may be
				alpha, numeric or a combination. Roman numerals are acceptable. 
		
		
			
				
				
			
		
	


	
	
		
			Container element for archive. 
		
		
			
				
			
		
	
	
		
			Used to indicate the designated archiving organization(s) for an
				item. Values for the name attribute are CLOCKSS, LOCKSS Portico, KB, DWT (Deep Web
				Technologies), Internet Archive
		
		
			
				
					
						
						
						
						
						
						
					
				
			
		
	

	
		
			 The date on which a dissertation was accepted by the institution
				awarding the degree, a report was approved, or a standard was accepted.
				approval_date includes the same elements as publication_date, but it has no
				attributes. It is a distinct element from publication_date to reflect that an
				important but different semantic meeting from publication_date 
		
		
			
				
			
		
	

	
	
		
			A list of articles, books, and other items cited by the parent item
				for which the DOI in the doi_data is being deposited. Some articles may have
				multiple lists of citations (e.g. main reference list, appendix reference list,
				etc.). All citations for one article should be included in a single citation_list
				regardless of whether one or more citation lists were in the original item. When
				combining multiple reference lists from an item into one citation_list element, but
				sure to give each citation a unique key attribute value. For example, if an appendix
				in an item has a separate citation list that restarts numbering at 1, these
				citations should be given key attributes such as "ab1" rather than "b1". Some
				articles may contain "Further Reading" or "Bibliography" lists. The distinguishing
				factor in these lists is that the references have not been cited from the
				article—they only provide a list of additional related reading material. It will be
				left to the discretion of the publisher if these items are to be considered
				citations and should be deposited. NOTE: If a citation_list element is given and is
				empty then all citations for the given DOI will be deleted, otherwise any existing
				citations for the given DOI are left intact in the database. It is quite common that
				a publisher wants to fix the DOI's metadata without resubmitting the citations.
				Leaving out the citation_list element will do that. Also note that any given
				citations will override older citations for the given DOI so citation_lists are not
				cumulative over multiple records or submissions. 
		
		
			
				
			
		
	
	
		
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
		
	
	
	
		
			citation is used to deposit each citation in the reference list of the item for which the DOI is being deposited. For details see: https://crossref.zendesk.com/hc/en-us/articles/215578403  
		
		
			
				
					
				
			
		
	
	

	
		
			citation_key allows the publisher to assign a unique ID to each
				citation that is deposited. It is recommended that this attribute be given the
				reference number if the publication uses reference numbers. For those publications
				that use name/date style citations, it is recommended that this attribute be used to
				indicate the sequential number of the citation in the reference list. However, some
				schema must be utilized as this is a required attribute. The system will use this
				key value to track the specific reference query and will return this value along
				with the DOI.
		
		
	
	
	
		
			A citation that is to an item other than a journal article, book, or
				conference paper and cannot be structured with the CrossRef citation model. Also, it
				is used for a citation to a journal article, book, or conference paper for which the
				depositing publisher does not have structured information. unstructured_citation
				allows a publisher to deposit references for which no structural information is
				available. These may be journal, book, or conference references for which the
				supplier did not provide markup, or other types of references (e.g. standards,
				patents, etc) which are not supported by CrossRef. This structure permits publishers
				to deposit complete reference lists, without regard to the availability of markup,
				or the need to parse references beyond those types that CrossRef supports.
				CrossRef's ability to process unstructured citations is limited, for details see
				https://support.crossref.org/hc/en-us/articles/215007383
		
		
			
				
			
		
	
	
		
			Journal title in a citation. Only used in the citation element.
				Journal title in citation deposits is used for both abbreviated and spelled out
				journal names. No attribute is required to distinguish between name types. Both
					Proc. Natl. Acad. Sci. U.S.A. and
					Proceedings of the National Academy of Sciences of the United
					States of America are valid journal titles to use in this
				element.
		
	
	
		
			Book series title in a citation. Only used in the citation element.
				series_title is an element for the deposit of book or conference series titles in
				citations without the hierarchy required by the series_metadata element. Note that
				face markup is not permitted when this element is deposited as part of a
				citation.
		
	
	
		
			Book volume title in a citation. Only used in the citation element.
				volume_title is an element for the deposit of book or conference volume titles in
				citations without the hierarchy required by the titles element. Note that face
				markup is not permitted when this element is deposited as part of a
				citation.
		
	
	
		
			First author in a citation. Only used in the citation element. The
				author element tags one author name in a citation without the hierarchy required by
				the contributors or person_name elements Only the first author should be deposited
				for each item. The author surname is required. Author initials may be added but are
				not recommended because queries work best when only the last name is provided. For
				example, the author "John Doe" can be deposited as Doe or
					Doe J, but the former style is recommended. If the author of a
				work is an organization rather than a person, the organization may be deposited as
				in: World Health Organization
		
	
	
		
			Year of publication in citation. Unlike the year element, cYear has a
				loose text model that can accommodate non-standard years such as year ranges such as
				"1998-1999". Note that years such as "1998a" or "1999b" should be deposited without
				the letter, e.g. "1998" or "1999". The letter is used for internal source document
				linking in name/date (Harvard) style documents rather than external cross reference
				linking to the original item.
		
	
	
		
			Article title in a citation. Use care to remove face markup (such as
				italic applied to genus or species names) from article titles as this markup is not
				supported by CrossRef.
		
	
    
         
            article number or other page identifier for an article that does not have page numbers, used typically for electronic-only journals.
         
    
	

	
		
			The element for depositing a stand alone component. The parent DOI
				must already exist (created in an earlier deposit or via some other registration
				process).
		
		
			
				
			
			
				
					
						
						
					
				
			
		
	
	
		
			The wrapper element for including a group of components under a
				journal article, conference proceeding, book chapter, stand alone component,
				dissertation, technical report or working paper, standard, or
				database.
		
		
			
				
			
		
	
	
		
			A container element that allows registration of supplemental
				information for a journal article, book chapter, or conference paper such as
				figures, tables, videos, or data sets. Currently, the deposit of components
				primarily achieves only the first objective as the CrossRef system is not setup yet
				to support queries for components. The metadata associated with a component is
				intended to enable simple lookup searches of components in the future. When
				deposited as part of the metadata for a higher level work the parent DOI is
				implicitly known via the XML hierarchy. When deposited separately the DOI of the
				higher level work must be provided explicitly (see sa_component) All descriptive
				elements are optional allowing for the creation of simple anonymous DOIs. The
				'parent_relation' attribute is mandatory and refers to the DOI described in the
				component's direct parent.
		
		
			
				
				
				
				
				
				
				
					
					
				

			
			
				
					
						
						
						
						
					
				
			
			
				
					

				
			
			
			
				
					
				
			
		
	
	
		
			Normally book content that is published as a series is required to
				have a series title with an ISSN and a book title and/or a book volume number along
				with a book ISBN. An exception is when book chapters are published on line first
				prior to being assigned to a specific book in which case only the series title (and
				ISSN) is known at time of DOI registration. Element unassigned_content is used as a
				placeholder to force recognition of this condition and thus prevent accidental
				omission of book level title information. When unassigned_content is present the
				system will allow omission of the ISBN. If unassigned_content is not present the
				system will require an ISBN for the book title.
		
		
			
				
					
						
					
				
			
		
	
	
		
			A narrative description of a file (e.g. a figure caption or
				video description) which may be independent of the host document context. The
				description element may be present more than once to provide alternative language
				values.
		
		
			
				
			
			
		
	
	
	
		
			Publisher's custom statement for their intent to publish content for which a pre-register DOI has been created
		
		
			
				
			
			
		
	

	
		
			Statement of competing interest supplied by a review author during the review process.
		
		
			
				
			
			
		
	

	
			
				Running numbers to specify the various reports (ex: RC1 to RC4) 
			
		
	
	
	
		
			
			
		
	
	
	
		
			A narrative description of a component's file format and/or the file
				extension (for mime types refer to http://www.iana.org/assignments/media-types/) The
				format element may contain only the mime_type attribute, or in addition it may
				contain a narrative description of the file format. Be sure to use the narrative
				portion to description only the format of the component and not the actual content
				of the component (use description to describe the component's
				content).
		
		
			
				
					
				
			
		
	

	
	
		
			Container element for CrossMark data.
		
		
			
				
				
				
				
					
						Some publishers encourage broad third
							party hosting of the publisher's content. Other publishers do not. And
							still others vary their policy depending on whether a particular article
							has been published under an OA policy or not. This boolean flag allows
							the publisher to indicate whether the CrossMarked content will only
							legitimately be updated on the CrossMark domain (true) or whether the
							publisher encourages updating the content on other sites as well
							(false).
					
				
				
					
					
				
			
		
	
	
		
			A DOI which points to a publisher's CrossMark policy document.
				Publishers might have different policies for different
				publications.
		
	
	
	
		
			Container element for crossmark_domain. A list of domains where the
				publisher maintains updates and corrections to their content. Minimally, one of
				these should include the Internet domain name of the publisher's web site(s), but
				the publisher might also decide to include 3rd party aggregators (e.g. Ebsco,
				IngentaConnect) or archives with which the publisher has agreements to update the
				content 
		
		
			
				
			
		
	
	
		
			This should be a simple Internet domain name or subdomain name (e.g.
				www.psychoceramics.org or psychoceramics.org). It is used to identify when a
				referring URL is coming from a CrossMark domain. A "crossmark_domain" is made up of
				two subelements; a "domain" and a "filter". The domain is required but the filter is
				optional and is only needed for use in situations where content from multiple
				publishers/publications is on the same host with the same domain name (e.g. an
				aggregator) and one needs to use the referrer's URI "path" to further determine
				whether the content in a crossmark domain.
		
		
			
				
				
			
		
	
	
		
			Required element. This should be a simple Internet domain name or
				subdomain name (e.g. www.psychoceramics.org or psychoceramics.org). It is used to
				identify when a referring URL is coming from a CrossMark domain.
		
	
	
		
			Optional element. The filter element is used to disambiguate content
				in situations where multiple publishers share the same host (e.g. when on an
				aggregated platform). It should contain a substring of the path that can be used to
				uniquely identify a publisher's or publication's content. For instance, using the
				string "alpsp" here would help the CrossMark system distinguish between ALPSP
				publications on the ingentaconnect host and other publications on the same
				host.
		
	
	
	
		
			Optional element. A document might provide updates (e.g. corrections,
				clarifications, retractions) to several other documents. When this is the case, the
				DOIs of the documents that are being *updated* should be listed
				here.
		
		
			
				
			
		
	
	
		
			The DOI of the content being updated (e.g. corrected, retracted,
				etc.) In the CrossMark Terms and Conditions "updates" are defined as changes that
				are likely to "change the reader’s interpretation or crediting of the work." That
				is, *editorially significant* changes. "Updates" should not include minor changes to
				spelling, punctuation, formatting, etc. Attributes: label: Required attribute. This
				should be a human-readable version of the "type" attribute. This is what gets
				displayed in the CrossMark dialog when there is an update. type: Required attribute.
				This attribute should be used to give the machine-readable name of the update type.
				The human-readable version of the type should be but in the "label" attribute. There
				are many "types" of updates. "Corrections, "clarifications", "retractions" and
				"withdrawals" are just a few of the better-known types. For these common types we
				recommend you use the values "correction", "clarification", "retraction" and
				"withdrawal" respectively as per your editorial policy. However, different
				publishers sometimes have to support different, custom update types- for instance,
				"protocol amendments", "letters of concern", "comments", etc. The attribute supports
				custom types as well. date: The date of the update will be displayed in the
				CrossMark dialog and can help the researcher easily tell whther they are likley to
				have seen the update.
		
		
			
				
					
						
							Required attribute. This attribute should be used to
								list the update type. Allowed update types are:
									
  • addendum
  • clarification
  • correction
  • corrigendum
  • erratum
  • expression_of_concern
  • new_edition
  • new_version
  • partial_retraction
  • removal
  • retraction
  • withdrawal
Required attribute. The date of the update will be displayed in the CrossMark dialog and can help the researcher easily tell whther they are likley to have seen the update.
Optional element. Publishers are encouraged to provided any non-bibliographical metadata that they feel might help the researcher evaluate and make better use of the content that the Crossmark record refers to. For example, publishers might want to provide funding information, clinical trial numbers, information about the peer-review process or a summary of the publication history of the document. An assertion is a piece of custom, non-bibliographic metadata that the publisher is asserting about the content to which the CrossMark refers. assertion attributes: explanation: If the publisher wants to provide a further explanation of what the particular "assertion" means, they can link to such an explanation by providing an appropriate url on the "explanation" attribute. group_label: This is the human-readable form of the "group_name" attribute. This is what will be displayed in the group headings on the CrossMark metadata record dialog. group_name: Some assertions could be logically "grouped" together in the CrossMark dialog. For instance, if the publisher is recording several pieces of metadata related to funding sources (source name, percentage, grant number), they may want to make sure that these three assertions are grouped next to each-other in the CrossMark dialog. The group_name attribute is the machine-readable value that will be used for grouping such assertions. label: This is the human-readable version of the name attribute which will be displayed in the CrossMark dialog. If this attribute is missing, then the value of the assertion will *not* be displayed in the dialog. Publishers may want to "hide" assertions this way in cases where the assertion value is too large or too complex to display in the dialog, but where the assertion is nonetheless valuable enough to include in API queries and metadata dumps (e.g. detailed licensing terms). name: This is the machine-readable name of the assertion. Use the "label" attribute to provide a human-readable version of the name. order: The publisher may want to control the order in which assertions are displayed to the user in the CrossMark dialog. All assertions will be sorted by this element if it is present. Optional attribute. If the publisher wants to provide a further explanation of what the particular "assertion" means, they can link to such an explanation by providing an appropriate url on the "explanation" attribute. Optional attribute. This is the human-readable form of the "group_name" attribute. This is what will be displayed in the group headings on the CrossMark metadata record dialog. Optional attribute. Some assertions could be logically "grouped" together in the CrossMark dialog. For instance, if the publisher is recording several pieces of metadata related to funding sources (source name, percentage, grant number), they may want to make sure that these three assertions are grouped next to each-other in the CrossMark dialog. The group_name attribute is the machine-readable value that will be used for grouping such assertions. Optional attribute. This is the human-readable version of the name attribute which will be displayed in the CrossMark dialog. If this attribute is missing, then the value of the assertion will *not* be displayed in the dialog. Publishers may want to "hide" assertions this way in cases where the assertion value is too large or too complex to display in the dialog, but where the assertion is nonetheless valuable enough to include in API queries and metadata dumps (e.g. detailed licensing terms) Required attribute. This is the machine-readable name of the assertion. Use the "label" attribute to provide a human-readable version of the name. Optional attribute. The publisher may want to control the order in which assertions are displayed to the user in the CrossMark dialog. All assertions will be sorted by this element if it is present. Optional attribute A wrapper for designators or other primary identifiers for a standard. Designator or other primary identifier for the standard being deposited. Required. Provides for defining a DOI for a broad grouping of standards. Provides for defining a DOI for a set of standards (sometimes know as truncated form). Provides for defining a DOI for a group of closely related standard documents (undated form is a stem for any dated form) Designator for standard being replaced by the standard being deposited. Designator for standard from which the current deposit is adopted. Designator for the previous revision of the standard being deposited. (note: use alt_as_published for revisions within designators having common stem) A wrapper for standards body information. Name of the standards organization / publisher. Required. Acronym for standards body. Will be used for query matching - required. A wrapper for Scholarly Sharing Network (SCN) policy information A group of related SCN policies An individual SCN policy




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