<!-- NLMCommon DTD

     Comments and suggestions are welcome.
     January 1, 2008 

             
     This is the DTD for data elements that are shared 
     among various applications at the U.S. National Library of Medicine. 
 
    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
-->
<!--    NLMCommon.dtd

        Document Type Definition for the PubMed Article DTD
        $Id: nlmcommon_080101.dtd 114839 2007-11-30 16:19:51Z korobtch $
-->
<!-- ====================================================================== -->
<!--   Revision Notes Section
    
    The following changes were made in the nlmcommon_080101.dtd:
    
     a. Added ELocationID in Article
            
     b. Added EIdType and ValidYN as attributes to ELocationID 

     c. Added ISSNLinking to MedlineJournalInfo

     d. Investigator & InvestigatorList were moved from nlmsharedcatcit dtd to
        nlmcommon dtd
            
     Historic Revision notes for previous versions of NLMCommon DTD
     See:
     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmcommon.html
-->
<!-- ================================================================= -->
<!--     internal DTD entities             -->   
<!ENTITY % Abstract "(AbstractText,CopyrightInformation?)">
<!ENTITY % personal.name "(LastName,(ForeName|(FirstName,MiddleName?))?,
                           Initials?,Suffix?)">
<!ENTITY % author.name "(%personal.name; | CollectiveName)">
<!ENTITY % data.template "#PCDATA">
<!ENTITY % ImprintType "(Current | Original)">
<!ENTITY % IndexingStatus "(Ceased-publication |  Continued-by-another-indexed-title | 
                            Currently-indexed |  Currently-indexed-Title-changed |
                            Date-range-of-indexed-citations-unspecified | 
                            Deselected) #IMPLIED">
<!ENTITY % IndexingTreatment "(Unknown | Full | Selective | ReferencedIn | 
                               ReferencedInNoDetails) #IMPLIED">
<!ENTITY % normal.date "(Year,Month,Day,(Hour,(Minute,Second?)?)?)">
<!ENTITY % pub.date "((Year, ((Month, Day?) | Season)?) | MedlineDate)">
<!-- ================================================================= -->
<!-- ================================================================= -->
<!-- This is the top level element for NCBIArticle -->
<!ELEMENT NCBIArticle (PMID, Article, MedlineJournalInfo,InvestigatorList?)>
<!-- ================================================================= -->
<!-- This is the top level element for Article -->
<!ELEMENT Article ((Journal | Book), %ArticleTitle.Ref;,
                  ((Pagination, ELocationID*) | ELocationID+),
                   Abstract?, Affiliation?, AuthorList?, Language+, DataBankList?, 
                    GrantList?, %PublicationType.Ref;, VernacularTitle?,
                    ArticleDate*)>
<!-- ================================================================= -->
<!--  Further Definitions of NLM Tags                                  -->
<!ELEMENT Abstract (%Abstract;)>
<!ELEMENT AbstractText (#PCDATA)>
<!ELEMENT AccessionNumber (#PCDATA)>
<!ELEMENT AccessionNumberList (AccessionNumber+)>
<!ELEMENT Acronym (#PCDATA)>
<!ELEMENT Affiliation (#PCDATA)>
<!ELEMENT Agency (#PCDATA)>
<!ELEMENT ArticleDate (%normal.date;)>
<!ATTLIST ArticleDate
          DateType CDATA  #FIXED "Electronic">
<!ELEMENT ArticleTitle (#PCDATA)>
<!ELEMENT Author ((%author.name;), Affiliation?,DatesAssociatedWithName?,
                 NameQualifier?,OtherInformation?,TitleAssociatedWithName?)>
<!ATTLIST Author
	ValidYN (Y | N) "Y"
>
<!ELEMENT AuthorList (Author+)>
<!ATTLIST AuthorList
	CompleteYN (Y | N) "Y"
>
<!ELEMENT Book (%PubDate.Ref;, Publisher, Title, AuthorList?,
                CollectionTitle?, Volume?)>
<!ELEMENT BroadJournalHeading (#PCDATA)>
<!ELEMENT BroadJournalHeadingList (BroadJournalHeading+)>
<!ELEMENT Coden (#PCDATA)>
<!ELEMENT CollectionTitle (#PCDATA)>
<!ELEMENT CollectiveName (#PCDATA)>
<!ELEMENT CopyrightInformation (#PCDATA)>
<!ELEMENT Country (#PCDATA)>
<!ELEMENT Coverage  (#PCDATA)>
<!ELEMENT DataBank (DataBankName, AccessionNumberList?)>
<!ELEMENT DataBankList (DataBank+)>
<!ATTLIST DataBankList
	CompleteYN (Y | N) "Y"
>
<!ELEMENT DataBankName (#PCDATA)>
<!ELEMENT DateIssued (#PCDATA)>
<!ELEMENT DatesAssociatedWithName (#PCDATA)>
<!ELEMENT DatesOfSerialPublication (#PCDATA)>
<!ELEMENT Day (#PCDATA)>

<!ELEMENT DescriptorName (#PCDATA)>
<!ATTLIST DescriptorName
	MajorTopicYN (Y | N) "N"
>
<!ELEMENT Edition (#PCDATA)>
<!ELEMENT ELocationID (#PCDATA)>
<!ATTLIST ELocationID
          EIdType %EIdType;
          ValidYN  (Y | N) "Y"
>
<!ELEMENT EndPage (#PCDATA)>
<!ELEMENT FirstName (#PCDATA)>
<!ELEMENT ForeName (#PCDATA)>
<!ELEMENT Frequency (#PCDATA)>
<!ATTLIST Frequency 
          FrequencyType (Current | Former) "Current"
>
<!ELEMENT Grant (%GrantID.Ref;, %Acronym.Ref;, %Agency.Ref;)>
<!ELEMENT GrantID (#PCDATA)>
<!ELEMENT GrantList (Grant+)>
<!ATTLIST GrantList
	CompleteYN (Y | N) "Y"
>
<!ELEMENT Hour (#PCDATA)>
<!ELEMENT Imprint (#PCDATA)>
<!ELEMENT Initials (#PCDATA)>
<!ELEMENT Investigator (%personal.name;, Affiliation?)>
<!ELEMENT InvestigatorList (Investigator+)>
<!ELEMENT ISOAbbreviation (#PCDATA)>
<!ELEMENT ISSN (#PCDATA)>
<!ATTLIST ISSN
	  IssnType  (Electronic | Print | Undetermined) #REQUIRED
>
<!ELEMENT ISSNLinking (#PCDATA)>
<!ELEMENT Issue (#PCDATA)>
<!ELEMENT Journal (%ISSN.Ref;, JournalIssue, Coden?, Title?, ISOAbbreviation?)>
<!ELEMENT JournalIssue (Volume?, Issue?, %PubDate.Ref;)>
<!ATTLIST JournalIssue
	CitedMedium (Internet | Print) #REQUIRED
>
<!ELEMENT Language (#PCDATA)>
<!ELEMENT LastName (#PCDATA)>
<!ELEMENT MedlineDate (#PCDATA)>
<!ELEMENT MedlineJournalInfo (Country?, MedlineTA, %NlmUniqueID.Ref;, ISSNLinking?)>
<!ELEMENT MedlinePgn (#PCDATA)>
<!ELEMENT MedlineTA (#PCDATA)>
<!ELEMENT MeshHeading (DescriptorName, QualifierName*)>
<!ELEMENT MeshHeadingList (MeshHeading+)>
<!ELEMENT MiddleName (#PCDATA)>
<!ELEMENT Minute (#PCDATA)>
<!ELEMENT Month (#PCDATA)>
<!ELEMENT NameQualifier (#PCDATA)>
<!ELEMENT NlmUniqueID (#PCDATA)>
<!ELEMENT OtherInformation (#PCDATA)>
<!ELEMENT Pagination ((StartPage, EndPage?, MedlinePgn?) | MedlinePgn)>
<!ELEMENT Place (#PCDATA)>
<!ATTLIST Place  
       ImprintType %ImprintType; "Current"
>
<!ELEMENT PlaceCode (#PCDATA)>
<!ELEMENT PMID (#PCDATA)>
<!ELEMENT ProjectedPublicationDate (#PCDATA)>
<!ELEMENT PubDate (%pub.date;)>
<!ELEMENT PublicationEndYear (#PCDATA)>
<!ELEMENT PublicationFirstYear (#PCDATA)>
<!ELEMENT PublicationInfo (Country?, PlaceCode?, Imprint*, Place*, 
                           Publisher*, DateIssued*,  ProjectedPublicationDate?,
                           PublicationFirstYear?, PublicationEndYear?, Edition?,
                           DatesOfSerialPublication*, Frequency*)>
<!ELEMENT PublicationType (#PCDATA)>
<!ELEMENT PublicationTypeList (PublicationType+)>
<!ELEMENT Publisher (#PCDATA)>
<!ELEMENT QualifierName (#PCDATA)>
<!ATTLIST QualifierName
	MajorTopicYN (Y | N) "N"
>
<!ELEMENT Season (#PCDATA)>
<!ELEMENT Second (#PCDATA)>
<!ELEMENT StartPage (#PCDATA)>
<!ELEMENT Suffix (#PCDATA)>
<!ELEMENT Title (#PCDATA)>
<!ELEMENT TitleAssociatedWithName (#PCDATA)>
<!ELEMENT VernacularTitle (#PCDATA)>
<!ELEMENT Volume (#PCDATA)>
<!ELEMENT Year (#PCDATA)>
