<!-- ============================================================= -->
<!--  MODULE:    Subject Phrase Class Elements                     -->
<!--  VERSION:   3.0                                               -->
<!--  DATE:      Feb 2008                                          -->
<!--                                                               -->
<!-- ============================================================= -->

<!-- ============================================================= -->
<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
<!--                        TYPICAL INVOCATION                     -->
<!--
"-//NLM//DTD Archiving and Interchange DTD Suite Subject Phrase Class Elements v3.0 20080202//EN"
     Delivered as file "phrase3.ent"                               -->
<!-- ============================================================= -->

<!-- ============================================================= -->
<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
<!--                                                               -->
<!-- PURPOSE:    Defines the phrase.class, that is, names the      -->
<!--             inline, subject-specific elements                 -->
<!--                                                               -->
<!--             If more specific subject words (such as "gene")   -->
<!--             are added to later version of this DTD, they      -->
<!--             should be added to the %phrase.class; entity and  -->
<!--             defined in this module or in %common.ent;         -->
<!--                                                               -->
<!-- CONTAINS:   1) Definition of the phrase class                 -->
<!--             2) Subject Emphasis                               -->
<!--                                                               -->
<!-- CREATED FOR:                                                  -->
<!--             Digital archives and publishers who wish to       -->
<!--             create a custom XML DTD for original markup of    -->
<!--             journal literature, books, and related material,  -->
<!--             or for archiving and transferring such material   -->
<!--             between archives.                                 -->
<!--                                                               -->
<!--             This DTD is in the public domain. An organization -->
<!--             that wishes to create its own DTD from the suite  -->
<!--             may do so without permission from NLM.            -->
<!--                                                               -->
<!--             The suite has been set up to be extended using a  -->
<!--             new DTD file and a new DTD-specific customization -->
<!--             module to redefine the many Parameter Entities.   -->
<!--             Do not modify the suite directly or redistribute  -->
<!--             modified versions of the suite.                   -->
<!--                                                               -->
<!--             In the interest of maintaining consistency and    -->
<!--             clarity for potential users, NLM requests:        -->
<!--                                                               -->
<!--             1. If you create a DTD from the Archiving and     -->
<!--                Interchange DTD Suite and intend to stay       -->
<!--                compatible with the suite, then please include -->
<!--                the following statement as a comment in all of -->
<!--                your DTD modules:                              -->
<!--                   "Created from, and fully compatible with,   -->
<!--                    the Archiving and Interchange DTD Suite."  -->
<!--                                                               -->
<!--             2. If you alter one or more modules of the suite, -->
<!--                then please rename your version and all its    -->
<!--                modules to avoid any confusion with the        -->
<!--                original suite. Also, please include the       -->
<!--                following statement as a comment in all your   -->
<!--                DTD modules:                                   -->
<!--                   "Based in part on, but not fully compatible -->
<!--                    with, the Archiving and Interchange DTD    --> 
<!--                    Suite."                                    -->
<!--                                                               -->
<!--             Suggestions for refinements and enhancements to   -->
<!--             the DTD suite should be sent in email to:         -->
<!--                 archive-dtd@ncbi.nlm.nih.gov                  -->
<!--                                                               -->
<!-- ORIGINAL CREATION DATE:                                       -->
<!--             December 2002                                     -->
<!--                                                               -->
<!-- CREATED BY: Jeff Beck       (NCBI)                            -->
<!--             Deborah Lapeyre (Mulberry Technologies, Inc.)     -->
<!--             Bruce Rosenblum (Inera Inc.)                      -->
<!--                                                               -->
<!--             NLM thanks the Harvard University Libraries, both -->
<!--             for proposing that a draft archiving NLM DTD for  --> 
<!--             life sciences journals be extended to accommodate -->
<!--             journals in all disciplines and for sponsoring    -->
<!--             Bruce Rosenblum's collaboration with other DTD    -->
<!--             authors in completing Version 1.0. The Andrew W.  --> 
<!--             Mellon Foundation provided support for these      --> 
<!--             important contributions.                          -->
<!--                                                               -->
<!-- ============================================================= -->


<!-- ============================================================= -->
<!--                    DTD VERSION/CHANGE HISTORY                 -->
<!-- ============================================================= -->
<!--
     =============================================================

Version  Reason/Occasion                   (who) vx.x (yyyy-mm-dd)

     =============================================================
     Version 3.0                       (DAL/BTU) v3.0 (2007-10-31)
     
     Version 3.0 is the first non-backward-compatible release.
     In addition to the usual incremental changes, some
     elements and attributes have been renamed and/or remodeled
     to better meet user needs and to increase tag set consistency.
     All module change histories are available through the Tag Suite 
     web site at http://dtd.nlm.nih.gov. 

     Details on version 3.0 are available at 
           http://dtd.nlm.nih.gov/3.0.
  
  1. Updated public identifier to "v3.0 20080202//EN"              -->


<!-- ============================================================= -->
<!--                    PARAMETER ENTITIES FOR ATTRIBUTE LISTS     -->
<!-- ============================================================= -->
                                                                
                                                                 
<!--                    ABBREVIATION ATTRIBUTES                    -->
<!--                    Attributes for the <abbrev> element        -->
<!ENTITY % abbrev-atts
             "id         ID                                 #IMPLIED
              content-type
                         CDATA                              #IMPLIED
              %might-link-atts;"                                     >
                                                                
                                                                 
<!--                    MILESTONE START ATTRIBUTES                 -->
<!--                    Attributes for the <milestone-start> 
                        element                                    -->
<!ENTITY % milestone-atts
            "id         ID                                 #IMPLIED  
             content-type   
                        CDATA                              #IMPLIED 
             rationale  CDATA                              #IMPLIED
             specific-use
                        CDATA                              #IMPLIED
             rid        IDREF                              #IMPLIED" >
                                                                
                                                                 
<!--                    MILESTONE END ATTRIBUTES                   -->
<!--                    Attributes for the <milestone-end> 
                        element                                    -->
<!ENTITY % milestone-end-atts
            "id         ID                                 #IMPLIED  
             rid        IDREF                              #IMPLIED" >
                                                                
                                                                 
<!--                    NAMED CONTENT ATTRIBUTES                   -->
<!--                    Attributes for the <named-content> element -->
<!ENTITY % named-content-atts
            "id         ID                                 #IMPLIED
             content-type   
                        CDATA                              #REQUIRED 
             specific-use
                        CDATA                              #IMPLIED
             %might-link-atts;"                                      >
                                                                
                                                                 
<!--                    STYLED CONTENT ATTRIBUTES                  -->
<!--                    Attributes for the <styled-content> element-->
<!ENTITY % styled-content-atts 
            "style      CDATA                             #IMPLIED
             style-type   
                        CDATA                             #IMPLIED 
             specific-use   
                        CDATA                             #IMPLIED"  >


<!-- ============================================================= -->
<!--                    PHRASE-LEVEL ELEMENTS                      -->
<!-- ============================================================= -->


<!--                    ABBREVIATION ELEMENTS                      -->
<!--                    Elements for use in the <abbrev> element   -->
<!ENTITY % abbrev-elements
                        "| %def.class;"                              >


<!--                    ABBREVIATION OR ACRONYM                    -->
<!--                    Used to identify an abbreviation or acronym
                        Details at: 
                        http://dtd.nlm.nih.gov/archiving/tag-library/3.0/index.html?elem=abbrev
                        http://dtd.nlm.nih.gov/publishing/tag-library/3.0/index.html?elem=abbrev
                        http://dtd.nlm.nih.gov/articleauthoring/tag-library/3.0/index.html?elem=abbrev
                        http://dtd.nlm.nih.gov/book/tag-library/3.0/index.html?elem=abbrev
                                                                   -->
<!ELEMENT  abbrev       (#PCDATA %abbrev-elements;)*                 >
<!ATTLIST  abbrev
             %abbrev-atts;                                           >


<!-- ============================================================= -->
<!--                    MILESTONE ELEMENTS                         -->
<!-- ============================================================= -->


<!--                    MILESTONE MODEL                            -->
<!--                    Model for the both the <milestone-start> and
                        <milestone-end> elements                   -->
<!ENTITY % milestone-model
                        "EMPTY"                                      >


<!--                    MILESTONE START                            -->
<!--                    Used to mark the start of a non-hierarchically
                        nested object, that is, a textual component
                        which cannot be expressed in the normal 
                        non-overlapping, OCHO structure of an XML
                        document. When this element is used, it is
                        assumed that the end of the textual
                        component will be marked with a 
                        <milestone-end> element.
                        Details at: 
                        http://dtd.nlm.nih.gov/archiving/tag-library/3.0/index.html?elem=milestone-start
                        http://dtd.nlm.nih.gov/publishing/tag-library/3.0/index.html?elem=milestone-start
                        http://dtd.nlm.nih.gov/book/tag-library/3.0/index.html?elem=milestone-start
                                                                   -->
<!ELEMENT  milestone-start
                        %milestone-model;                            >
<!ATTLIST  milestone-start
             %milestone-atts;                                        >


<!--                    MILESTONE END                              -->
<!--                    Used to mark the end of a non-hierarchically
                        nested object, that is, a textual component
                        which cannot be expressed in the normal 
                        non-overlapping, OCHO structure of an XML
                        document. When this element is used, it is
                        assumed that the start of the textual
                        component was marked with a <milestone-start>
                        element. 
                        Details at: 
                        http://dtd.nlm.nih.gov/archiving/tag-library/3.0/index.html?elem=milestone-end
                        http://dtd.nlm.nih.gov/publishing/tag-library/3.0/index.html?elem=milestone-end
                        http://dtd.nlm.nih.gov/book/tag-library/3.0/index.html?elem=milestone-end
                                                                   -->
<!ELEMENT  milestone-end
                        %milestone-model;                            >
<!ATTLIST  milestone-end
             %milestone-atts;                                        >


<!-- ============================================================= -->
<!--                    NAMED CONTENT ELEMENTS                     -->
<!-- ============================================================= -->


<!--                    NAMED CONTENT ELEMENTS                     -->
<!--                    The elements that can be included along with
                        data characters inside the content model of
                        the <named-content> element                -->
<!ENTITY % named-content-elements
                        "| %address-link.class; |
                         %article-link.class; |
                         %block-display.class; | %block-math.class;|
                         %emphasis.class;  | 
                         %inline-display-noalt.class; | 
                         %inline-math.class; | %list.class; | 
                         %math.class; | %phrase.class; | 
                         %simple-link.class; | 
                         %subsup.class; | %rest-of-para.class;"      >


<!--                    NAMED SPECIAL (SUBJECT) CONTENT            -->
<!--                    A semantically distinct word or phrase 
                        within the text. Often such phrases are
                        treated differently, for example, given a
                        different typographic style or look, to call
                        attention to the subject matter. For
                        example, the word is a drug name or a 
                        gene or the phrase identifies an organism 
                        genus/species.
                        Details at: 
                        http://dtd.nlm.nih.gov/archiving/tag-library/3.0/index.html?elem=named-content
                        http://dtd.nlm.nih.gov/publishing/tag-library/3.0/index.html?elem=named-content
                        http://dtd.nlm.nih.gov/articleauthoring/tag-library/3.0/index.html?elem=named-content
                        http://dtd.nlm.nih.gov/book/tag-library/3.0/index.html?elem=named-content
                                                                   -->
<!ELEMENT  named-content
                        (#PCDATA %named-content-elements;)*          >
<!ATTLIST  named-content
             %named-content-atts;                                    >


<!-- ============================================================= -->
<!--                    STYLED CONTENT ELEMENTS                    -->
<!-- ============================================================= -->


<!--                    STYLED CONTENT ELEMENTS                    -->
<!--                    The elements that can be included along with
                        data characters inside the content model of
                        the <styled-content> element               -->
<!ENTITY % styled-content-elements
                        "| %address-link.class; |
                         %article-link.class; |
                         %block-display.class; | %block-math.class;|
                         %emphasis.class; | 
                         %inline-display-noalt.class; | 
                         %inline-math.class; | %list.class; | 
                         %math.class; | %phrase.class; | 
                         %simple-link.class; | 
                         %subsup.class; | %rest-of-para.class;"      >


<!--                    STYLED SPECIAL (SUBJECT) CONTENT           -->
<!--                    A stylistically distinct word or phrase 
                        within the text, that cannot be tagged using
                        any of the other mechanisms for such content.
                        In other words: the content cannot be 
                        described with bold, italic, monospace or any
                        of the other emphasis class elements and
                        <named-content> is inappropriate because the
                        semantic reason behind the typographic
                        distinction is not clear.
                        Details at: 
                        http://dtd.nlm.nih.gov/archiving/tag-library/3.0/index.html?elem=styled-content
                        http://dtd.nlm.nih.gov/publishing/tag-library/3.0/index.html?elem=styled-content
                        http://dtd.nlm.nih.gov/articleauthoring/tag-library/3.0/index.html?elem=styled-content
                        http://dtd.nlm.nih.gov/book/tag-library/3.0/index.html?elem=styled-content
                                                                   -->
<!ELEMENT  styled-content
                        (#PCDATA %styled-content-elements;)*         >
<!ATTLIST  styled-content
             %styled-content-atts;                                   >


<!-- ================== End Phrase Class Module ================== -->
