<!-- NLM MedlineCitationSet DTD

     This is the DTD which NLM has written for Internal and External Use.
     January 1, 2010

     **THIS IS THE FORTHCOMING DTD TO BE USED FOR MEDLINE/PUBMED DATA IN
     2010 AND IS NOT CURRENTLY IN USE.  
     SEE http://www.nlm.nih.gov/databases/dtd/ FOR LINKS TO THE SUITE OF 
     DTDS DATED JANUARY 1, 2009 CURRENTLY IN USE.**

     NOTE:  The use of "Medline" in a DTD or element name does not mean the record 
     represents a citation from a Medline-selected journal.  When the NLM DTDs and 
     XML elements were first created, MEDLINE records were the only data exported. 
     Now NLM exports citations other than MEDLINE records using these tools. To 
     minimize unnecessary disruption to users of the data and tools, NLM has
     retained the original DTD and element names (e.g., NLMMedlineCitationSet, 
     MedlineTA, MedlineJournalInfo)).  

     NOTE:  StartPage and EndPage in Pagination element and NameID in Author
     and Investigator elements are not currently used; are reserved for future use.  
                

        * = 0 or more occurrences (optional element, repeatable)
        ? = 0 or 1 occurrences (optional element, at most 1)
        + = 1 or more occurrences (required element, repeatable)
        | = choice, one or the other but not both
        no symbol = required element
-->
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<!--             Revision Notes Section

  The following changes were made:
  
        a. The nlmmedline_090101.dtd and nlmmedlinecitation_090101.dtd have 
           been used as the base.
        b. The nlmcommon and sharedcatcat external entities have been merged into 
           this single DTD. All extraneous nlmcommon and sharedcatcit objects not 
           required by MedlineCitationSet have been removed.
        c. No internal DTD entity references are used.
           All elements and attributes are defined explicitly in this DTD.
        d. All unused and unmapped tags have been removed.
        e. Removed Book subtree from Article.	
        f. Removed HSR, HMD and SIS from KeywordList Owner.
        g. Removed SIS from MedlineCitation Owner.
        h. Removed SIS and NOTNLM from GeneralNote Owner. 
        i. Removed IM,QCICL,QCIM and SGC from Source.
        j. Removed Hour, Minute, and Second.
        k. Removed DatesAssociatedWithName,NameQualifier,OtherInformation and
           TitleAssociatedWithName from Author and PersonalNameSubject.
        l. Removed PublicationInfo and its related elements.
        m. Removed NCBIArticle.
        n. Removed NlmDcmsID from MedlineCitation.
        o. Removed Prefix attribute from OtherID.
        p. Removed BroadJournalHeadingList,BroadJournalHeading,Coden,
           CollectiveTitle,Coverage,FirstName,Frequency and MiddleName.
        q. Reorganized CommentsCorrections to one main element with 
           RefType attribute. RefType valid values were previously
           element names under CommentsCorrections. Added Cites as new
           RefType valid value.  
        r. Added NameID to Author and Investigator elements.  


-->
<!-- ====================================================================== -->
<!-- ================================================================= -->
<!ELEMENT	MedlineCitationSet (MedlineCitation*, DeleteCitation?)>
<!ELEMENT	MedlineCitation (PMID, DateCreated, DateCompleted?, DateRevised?,
                Article, MedlineJournalInfo, ChemicalList?, CitationSubset*, 
                CommentsCorrectionsList?, GeneSymbolList?, MeshHeadingList?, 
                NumberOfReferences?, PersonalNameSubjectList?, OtherID*, 
                OtherAbstract*, KeywordList*, SpaceFlightMission*, 
                InvestigatorList?, GeneralNote*)>
<!ATTLIST	MedlineCitation 
                Owner  (NLM | NASA | PIP | KIE | HSR | HMD | NOTNLM) "NLM"
		Status (Completed | In-Process | PubMed-not-MEDLINE | 
                        In-Data-Review | Publisher | MEDLINE | 
                        OLDMEDLINE) #REQUIRED>
<!ELEMENT	Abstract (AbstractText,CopyrightInformation?)>
<!ELEMENT	AbstractText (#PCDATA)>
<!ELEMENT	AccessionNumber (#PCDATA)>
<!ELEMENT	AccessionNumberList (AccessionNumber+)>
<!ELEMENT	Acronym (#PCDATA)>
<!ELEMENT	Affiliation (#PCDATA)>
<!ELEMENT	Agency (#PCDATA)>
<!ELEMENT	Article (Journal,ArticleTitle,((Pagination, ELocationID*) | 
                        ELocationID+),Abstract?, Affiliation?, AuthorList?, 
                        Language+, DataBankList?, GrantList?,PublicationTypeList, 
                        VernacularTitle?, ArticleDate*)>
<!ATTLIST	Article 
                PubModel (Print | Print-Electronic | Electronic | 
                          Electronic-Print) #REQUIRED>
<!ELEMENT	ArticleDate (Year,Month,Day)>
<!ATTLIST	ArticleDate DateType CDATA  #FIXED "Electronic">
<!ELEMENT	ArticleTitle (#PCDATA)>
<!ELEMENT	Author ((LastName, ForeName?, Initials?, Suffix?, NameID*) | 
                         (CollectiveName,NameID*))>
<!ATTLIST	Author ValidYN (Y | N) "Y">
<!ELEMENT	AuthorList (Author+)>
<!ATTLIST	AuthorList CompleteYN (Y | N) "Y">
<!ELEMENT	Chemical (RegistryNumber,NameOfSubstance)>
<!ELEMENT	ChemicalList (Chemical+)>
<!ELEMENT	CitationSubset (#PCDATA)>
<!ELEMENT	CollectiveName (#PCDATA)>
<!ELEMENT	CommentsCorrections (RefSource,PMID?,Note?)>
<!ATTLIST   CommentsCorrections 
                RefType (CommentOn | CommentIn | ErratumIn | ErratumFor | 
                PartialRetractionIn | PartialRetractionOf | RepublishedFrom |
                RepublishedIn | RetractionOf | RetractionIn | UpdateIn |
                UpdateOf | SummaryForPatientsIn | OriginalReportIn |
                ReprintOf | ReprintIn | Cites) #REQUIRED >
<!ELEMENT	CommentsCorrectionsList (CommentsCorrections+)>
<!ELEMENT	CopyrightInformation (#PCDATA)>
<!ELEMENT	Country (#PCDATA)>
<!ELEMENT	DataBank (DataBankName, AccessionNumberList?)>
<!ELEMENT	DataBankList (DataBank+)>
<!ATTLIST	DataBankList CompleteYN (Y | N) "Y">
<!ELEMENT	DataBankName (#PCDATA)>
<!ELEMENT	DateCompleted (Year,Month,Day)>
<!ELEMENT	DateCreated (Year,Month,Day)>
<!ELEMENT	DateRevised (Year,Month,Day)>
<!ELEMENT	Day (#PCDATA)>
<!ELEMENT	DescriptorName (#PCDATA)>
<!ATTLIST	DescriptorName MajorTopicYN (Y | N) "N">
<!ELEMENT	ELocationID (#PCDATA)>
<!ATTLIST	ELocationID EIdType (doi | pii) #REQUIRED 
            ValidYN  (Y | N) "Y">
<!ELEMENT   EndPage (#PCDATA)>
<!ELEMENT	ForeName (#PCDATA)>
<!ELEMENT	GeneSymbol (#PCDATA)>
<!ELEMENT	GeneSymbolList (GeneSymbol+)>
<!ELEMENT	GeneralNote (#PCDATA)>
<!ATTLIST	GeneralNote Owner (NLM | NASA | PIP | KIE | HSR | HMD) "NLM">
<!ELEMENT	Grant (GrantID?, Acronym?, Agency, Country)>
<!ELEMENT	GrantID (#PCDATA)>
<!ELEMENT	GrantList (Grant+)>
<!ATTLIST	GrantList CompleteYN (Y | N) "Y">
<!ELEMENT	ISOAbbreviation (#PCDATA)>
<!ELEMENT	ISSN (#PCDATA)>
<!ATTLIST	ISSN IssnType  (Electronic | Print) #REQUIRED>
<!ELEMENT   ISSNLinking (#PCDATA)>
<!ELEMENT	Initials (#PCDATA)>
<!ELEMENT	Investigator (LastName,ForeName?, Initials?,Suffix?,NameID*,Affiliation?)>
<!ATTLIST	Investigator ValidYN (Y | N) "Y">
<!ELEMENT	InvestigatorList (Investigator+)>
<!ELEMENT	Issue (#PCDATA)>
<!ELEMENT	Journal (ISSN?, JournalIssue, Title?, ISOAbbreviation?)>
<!ELEMENT	JournalIssue (Volume?, Issue?, PubDate)>
<!ATTLIST	JournalIssue CitedMedium (Internet | Print) #REQUIRED>
<!ELEMENT	Keyword (#PCDATA)>
<!ATTLIST	Keyword MajorTopicYN (Y | N) "N">
<!ELEMENT	KeywordList (Keyword+)>
<!ATTLIST	KeywordList Owner (NLM | NASA | PIP | KIE | NOTNLM) "NLM">
<!ELEMENT	Language (#PCDATA)>
<!ELEMENT	LastName (#PCDATA)>
<!ELEMENT	MedlineDate (#PCDATA)>
<!ELEMENT	MedlineJournalInfo (Country?, MedlineTA, NlmUniqueID?,ISSNLinking?)>
<!ELEMENT   MedlinePgn (#PCDATA)>
<!ELEMENT	MedlineTA (#PCDATA)>
<!ELEMENT	MeshHeading (DescriptorName, QualifierName*)>
<!ELEMENT	MeshHeadingList (MeshHeading+)>
<!ELEMENT	Month (#PCDATA)>
<!ELEMENT   NameID (#PCDATA)>
<!ATTLIST   NameID 
            Source (NCBI | Publisher | NISO | ISO) #REQUIRED >
<!ELEMENT	NameOfSubstance (#PCDATA)>
<!ELEMENT	NlmUniqueID (#PCDATA)>
<!ELEMENT	Note (#PCDATA)>
<!ELEMENT	NumberOfReferences (#PCDATA)>
<!ELEMENT	OtherAbstract (AbstractText,CopyrightInformation?)>
<!ATTLIST	OtherAbstract Type (AAMC | AIDS | KIE | PIP | 
                                    NASA | Publisher) #REQUIRED>
<!ELEMENT	OtherID (#PCDATA)>
<!ATTLIST	OtherID Source (NASA | KIE | PIP | POP | ARPL | CPC | 
                                IND | CPFH | CLML | NRCBL | NLM) #REQUIRED>
<!ELEMENT	PMID (#PCDATA)>
<!ELEMENT	Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
<!ELEMENT	PersonalNameSubject (LastName,ForeName?, Initials?,Suffix?)>
<!ELEMENT	PersonalNameSubjectList (PersonalNameSubject+)>
<!ELEMENT	PubDate ((Year, ((Month, Day?) | Season)?) | MedlineDate)>
<!ELEMENT	PublicationType (#PCDATA)>
<!ELEMENT	PublicationTypeList (PublicationType+)>
<!ELEMENT	QualifierName (#PCDATA)>
<!ATTLIST	QualifierName MajorTopicYN (Y | N) "N">
<!ELEMENT	RefSource (#PCDATA)>
<!ELEMENT	RegistryNumber (#PCDATA)>
<!ELEMENT	Season (#PCDATA)>
<!ELEMENT	SpaceFlightMission (#PCDATA)>
<!ELEMENT   StartPage (#PCDATA)>
<!ELEMENT	Suffix (#PCDATA)>
<!ELEMENT	Title (#PCDATA)>
<!ELEMENT	VernacularTitle (#PCDATA)>
<!ELEMENT	Volume (#PCDATA)>
<!ELEMENT	Year (#PCDATA)>
<!ELEMENT	DeleteCitation (PMID+)>
