<!-- NLMMedlineCitation DTD   
     
     Comments and suggestions are welcome.
     January 1, 2009 v.2

     **THIS IS THE FORTHCOMING DTD FOR 2009 NOT CURRENTLY IN USE.  
     SEE http://www.nlm.nih.gov/databases/dtd/nlmmedlinecitation_080101.dtd FOR THE 
     NLMMEDLINECITATION DTD DATED JANUARY 1, 2008 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., NLMMedline DTD, MedlineTA,
    MedlineJournalInfo)).       
       
  * = 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
-->
<!-- ================================================================= -->
<!--   Revision Notes Section 

The following changes were made in the nlmmedlinecitation_090101.dtd:

     a. Changed entity reference from "nlmsharedcatcit_080101.dtd" 
             to: "nlmsharedcatcit_090101.dtd" 
     
     b. Moved entity Type to nlmcommon dtd

     c. Added NLM value to entity Source
 
     d. CHANGE WITHDRAWN FOR V.2: Delete entity NlmDcmsID.Ref
   
  
     Historic Revision notes for previous versions of NLMMedlineCitation DTD
     See:
     http://www.nlm.nih.gov/databases/dtd/history_dtd_medlinecitation.html

 -->
<!-- ================================================================= -->
<!-- external DTD entities -->
<!ENTITY % EIdType "(doi | pii) #REQUIRED">
<!-- ================================================================= -->
<!-- internal DTD entities -->
<!ENTITY % Owner "(NLM | NASA | PIP | KIE | HSR | HMD | SIS | NOTNLM)">
<!ENTITY % Ref.template "(RefSource,
                          PMID?, Note?)">
<!ENTITY % PubModel "(Print | Print-Electronic | Electronic | Electronic-Print) #REQUIRED">
<!ENTITY % Source "(NASA | KIE | PIP | POP | ARPL | CPC | IND | CPFH | 
                    CLML | IM | SGC | NRCBL | QCICL | QCIM | NLM) #REQUIRED">
<!ENTITY % Status "(Completed | In-Process | PubMed-not-MEDLINE |
                    In-Data-Review | Publisher | MEDLINE | OLDMEDLINE) #REQUIRED">
<!-- ================================================================= -->
<!-- ================================================================= -->
<!-- Reference to Where the NLM Common DTD via NLMSharedCatCit DTD is located  -->
<!ENTITY % NlmSharedCatCit PUBLIC "-//NLM//DTD SharedCatCit, 1st January 2009//EN" 
"nlmsharedcatcit_090101.dtd" >  
%NlmSharedCatCit;
<!-- =================================================================  -->
<!-- This is the top level element for MedlineCitation -->
<!ELEMENT MedlineCitation (%NlmDcmsID.Ref;, %PMID.Ref;, %DateCreated.Ref;, DateCompleted?,
                           DateRevised?, Article, MedlineJournalInfo, ChemicalList?, 
                           CitationSubset*, CommentsCorrections?, GeneSymbolList?, 
                           MeshHeadingList?, NumberOfReferences?, PersonalNameSubjectList?,
                           OtherID*, OtherAbstract*, KeywordList*, SpaceFlightMission*, 
                           InvestigatorList?, GeneralNote*)>
<!ATTLIST MedlineCitation
	Owner %Owner; "NLM"
	Status %Status;
>
<!ATTLIST Article
          PubModel %PubModel;
>
<!-- End of MedlineCitation group -->
<!-- ================================================================= -->
<!--             Further Definition of NLM Tags         -->
<!ELEMENT CitationSubset (#PCDATA)>
<!ELEMENT CommentIn (%Ref.template;)>
<!ELEMENT CommentOn (%Ref.template;)>
<!ELEMENT CommentsCorrections (CommentOn*, CommentIn*, ErratumIn*, ErratumFor*,
                               PartialRetractionIn*, PartialRetractionOf*,
                               RepublishedFrom*, RepublishedIn*, RetractionOf*,
                               RetractionIn*, UpdateIn*, UpdateOf*, 
                               SummaryForPatientsIn*, OriginalReportIn*, ReprintOf*, ReprintIn*)>
<!ELEMENT ErratumFor (%Ref.template;)>
<!ELEMENT ErratumIn (%Ref.template;)>
<!ATTLIST GeneralNote
	Owner %Owner; "NLM"
>
<!ELEMENT GeneSymbol (#PCDATA)>
<!ELEMENT GeneSymbolList (GeneSymbol+)>
<!ELEMENT NlmDcmsID (#PCDATA)>
<!ELEMENT Note (#PCDATA)>
<!ELEMENT NumberOfReferences (#PCDATA)>
<!ELEMENT OriginalReportIn (%Ref.template;)>
<!ELEMENT PartialRetractionIn (%Ref.template;)>
<!ELEMENT PartialRetractionOf (%Ref.template;)>
<!ELEMENT RefSource (#PCDATA)>
<!ELEMENT ReprintIn (%Ref.template;)>
<!ELEMENT ReprintOf (%Ref.template;)>
<!ELEMENT RepublishedFrom (%Ref.template;)>
<!ELEMENT RepublishedIn (%Ref.template;)>
<!ELEMENT RetractionIn (%Ref.template;)>
<!ELEMENT RetractionOf (%Ref.template;)>
<!ELEMENT SummaryForPatientsIn (%Ref.template;)>
<!ELEMENT UpdateIn (%Ref.template;)>
<!ELEMENT UpdateOf (%Ref.template;)>
<!-- ================================================================= -->
