<!-- NLMSharedCatCit DTD

     Comments and suggestions are welcome.
     January 1, 2008
  
     This is the DTD for data elements that are shared between 
     NLMCatalogRecord and NLMMedlineCitation DTDs 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
-->
<!-- ================================================================= -->
<!--   Revision Notes Section 

The following changes were made in the nlmsharedcatcit_080101.dtd:
     
     a.  Changed entity reference from "nlmcommon_070101.dtd"
                      to "nlmcommon_080101.dtd"

     b.  Moved Investigator & InvestigatorList from nlmsharedcatcit dtd to
         nlmcommon dtd
    
    Historic Revision notes for previous versions of NLMSharedcatcit DTD
     See:
     http://www.nlm.nih.gov/databases/dtd/history_dtd_nlmsharedcatcit.html

-->
<!-- ====================================================================== -->
<!-- internal DTD entities -->
<!ENTITY % NlmUniqueID.Ref "NlmUniqueID?">
<!-- ====================================================================== -->
<!-- ====================================================================== -->
<!-- Reference to Where the NLMCommon DTD is located  -->
<!ENTITY % NlmCommon PUBLIC "-//NLM//DTD Common, 1st January 2008//EN" 
 "nlmcommon_080101.dtd"> 
%NlmCommon;
<!-- ======================================================================= -->
<!--  Further Definitions of NLM Tags                                        -->
<!ELEMENT Chemical (RegistryNumber, NameOfSubstance)>
<!ELEMENT ChemicalList (Chemical+)>
<!ELEMENT DateCompleted (%normal.date;)>
<!ELEMENT DateCreated (%normal.date;)>
<!ELEMENT DateRevised (%normal.date;)>
<!ELEMENT GeneralNote (#PCDATA)>
<!ELEMENT Keyword (#PCDATA)>
<!ATTLIST Keyword
	MajorTopicYN (Y | N) "N"
>
<!ELEMENT KeywordList (Keyword+)>
<!ATTLIST KeywordList
	Owner %Owner; "NLM"
>
<!ELEMENT NameOfSubstance (#PCDATA)>
<!ELEMENT OtherAbstract (%Abstract;)>
<!ATTLIST OtherAbstract
	Type %Type;
>
<!ELEMENT OtherID (#PCDATA)>
<!ATTLIST OtherID
        Prefix CDATA #IMPLIED
	Source %Source;       
>
<!ELEMENT PersonalNameSubject (%personal.name;, DatesAssociatedWithName?,
                               NameQualifier?, OtherInformation?,
                               TitleAssociatedWithName?)>
<!ELEMENT PersonalNameSubjectList (PersonalNameSubject+)>
<!ELEMENT RegistryNumber (#PCDATA)>
<!ELEMENT SpaceFlightMission (#PCDATA)>
