<!-- ============================================================= -->
<!--  MODULE:    XML Special Characters Module                     -->
<!--  VERSION:   2.3                                               -->
<!--  DATE:      February 2007                                     -->
<!-- ============================================================= -->

<!-- ============================================================= -->
<!--                    PUBLIC DOCUMENT TYPE DEFINITION            -->
<!--                        TYPICAL INVOCATION                     -->
<!--
"-//NLM//DTD Archiving and Interchange DTD Suite XML Special Characters Module v2.3 20070202//EN"
     Delivered as file "xmlspecchars.ent"                          -->
<!-- ============================================================= -->

<!-- ============================================================= -->
<!-- SYSTEM:     Archiving and Interchange DTD Suite               -->
<!--                                                               -->
<!-- PURPOSE:    External Parameter Entities for calling in the    -->
<!--             special character entities                        -->
<!--                                                               -->
<!-- CONTAINS:   1) Calls to external entity sets                  -->
<!--                                                               -->
<!-- MODULES REQUIRED:                                             -->
<!--             The standard ISO special character entity sets    -->
<!--             (see below)                                       -->
<!--                                                               -->
<!-- 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 2.3                       (DAL/BTU) v2.3 (2007-02-02)
     
     Enhancement Release (2.3) following the Working Group meetings 
     of Oct-Nov/2006-Jan/2007. No backward-incompatible changes.
     Archiving loosened even more. New structures for all the DTDs. 
     
  4. Updated public identifier to "v2.3 20070202//EN"          

     =============================================================
     Version 2.1                   (DAL/TRG/BTU) v2.1 (2005-06-30)
          
     Changed to MathML 2.0 and MathML 2.0 Character Sets
     Added new material requested by the online list     

  3. NEW CHARACTER ENTITY SETS
     MathML had modified their character entity sets and this DTD
     was changed to match. The new sets:
       a) Now match Unicode 4.0
       b) Have changed the older private use areas to 4.0 mappings
       c) Have a new directory structure, which separates the
          ISO 8879 (SGML) sets from the ISO 9573-13 (ISO tech rpt)
          sets. The MathML DTD uses some members of both sets
          and this DTD Suite has followed their usage exactly.
          So there are now 3 character subdirectories:
            - iso8879 (from SGML used in MathML)
            - iso9573-13 (from ISO Tech Rpt used in MathML)
            - xmlchars (from SGML not used in MathML)
          
          Implementor Alert: The MathML DTD includes some entity
          files in both sets (for example "isoamsa.ent" is in 
          both directories, but has added characters in the 
          "iso9573-13" directory.) This Suite includes only 
          the entity files actually referenced.
          
  2. Updated public identifier to "v2.3 20070202" 

     =============================================================
     Version 2.0                       (DAL/BTU) v2.0 (2004-08-30)
     
     Major requirement changes led to the new release, producing
     DTD version "2.0":
       a) The splitting of the Archival and Interchange Tag Set 
          DTDs into three DTDs from two: an authoring DTD, an
          archive regularization and interchange DTD (the
          current Blue Publishing DTD), and a preservationist 
          archive DTD (the current Green Archiving and Interchange 
          DTD).
       b) AIT Working Group suggestions from the June 04 meeting 
          and June/July 2004 followup discussions
       c) Suite remodularization to meet new (and newly articulated)
          modularization requirements
       d) New or renamed classes and mixes to make modifications
          easier and more consistent

  1. Updated public identifier to "v2.3 20070202"          
                                                                   -->


<!-- ============================================================= -->
<!--                    ENTITY SETS FROM INFORMATIVE ANNEX TO      --> 
<!--                       ISO 8879:1986 (SGML)                    -->
<!-- ============================================================= -->


<!--                    ISO STANDARD ADDED LATIN 1                 -->
<!ENTITY % ISOlat1 PUBLIC
"-//W3C//ENTITIES Added Latin 1 for MathML 2.0//EN"
"iso8879/isolat1.ent"                                                >


<!--                    ISO STANDARD ADDED LATIN 2                 -->
<!ENTITY % ISOlat2 PUBLIC
"-//W3C//ENTITIES Added Latin 2 for MathML 2.0//EN"
"iso8879/isolat2.ent"                                                >


<!--                    ISO BOX AND LINE DRAWING                   -->
<!ENTITY % ISObox       PUBLIC 
"-//W3C//ENTITIES Box and Line Drawing for MathML 2.0//EN"
"iso8879/isobox.ent"                                                 >


<!--                    ISO STANDARD DIACRITICAL MARKS             -->
<!ENTITY % ISOdia PUBLIC
"-//W3C//ENTITIES Diacritical Marks for MathML 2.0//EN"
"iso8879/isodia.ent"                                                 >


<!--                    ISO STANDARD NUMERIC AND SPECIAL GRAPHIC   -->
<!ENTITY % ISOnum PUBLIC
"-//W3C//ENTITIES Numeric and Special Graphic for MathML 2.0//EN"
"iso8879/isonum.ent"                                                 >


<!--                    ISO STANDARD PUBLISHING                    -->
<!ENTITY % ISOpub PUBLIC
"-//W3C//ENTITIES Publishing for MathML 2.0//EN"
"iso8879/isopub.ent"                                                 >


<!--                    ISO STANDARD RUSSIAN CYRILLIC              -->
<!ENTITY % ISOcyr1 PUBLIC 
"-//W3C//ENTITIES Russian Cyrillic for MathML 2.0//EN"
"iso8879/isocyr1.ent"                                                >


<!--                    ISO STANDARD NON-RUSSIAN CYRILLIC          -->
<!ENTITY % ISOcyr2 PUBLIC
"-//W3C//ENTITIES Non-Russian Cyrillic for MathML 2.0//EN"
"iso8879/isocyr2.ent"                                                >


<!-- ============================================================= -->
<!--                    ISO 8879 NOT USED BY MATHML                -->
<!-- ============================================================= -->


<!--                    ISO STANDARD GREEK LETTERS                 -->
<!ENTITY % ISOgrk1 PUBLIC
"-//W3C//ENTITIES Greek Letters//EN"
"xmlchars/isogrk1.ent"                                               >


<!--                    ISO STANDARD MONOTONIKO GREEK              -->
<!ENTITY % ISOgrk2 PUBLIC
"-//W3C//ENTITIES Monotoniko Greek//EN"
"xmlchars/isogrk2.ent"                                               >


<!--                    ISO STANDARD ALTERNATIVE GREEK SYMBOLS     -->
<!ENTITY % ISOgrk4 PUBLIC
"-//W3C//ENTITIES Alternative Greek Symbols//EN"
"xmlchars/isogrk4.ent"                                               >


<!-- ============================================================= -->
<!--                    ISO TECHNICAL REPORT 9573-13 ENTITY SETS   -->
<!-- ============================================================= -->


<!--                    ISO STANDARD GENERAL TECHNICAL             -->
<!ENTITY % ISOtech PUBLIC
"-//W3C//ENTITIES General Technical for MathML 2.0//EN"
"iso9573-13/isotech.ent"                                             >


<!--                    ISO STANDARD GREEK SYMBOLS                 -->
<!ENTITY % ISOgrk3 PUBLIC
"-//W3C//ENTITIES Greek Symbols for MathML 2.0//EN"
"iso9573-13/isogrk3.ent"                                             >


<!--                    ISO STANDARD MATH ALPHABETS (SCRIPT)       -->
<!ENTITY % ISOmscr PUBLIC
"-//W3C//ENTITIES Math Alphabets: Script for MathML 2.0//EN"
"iso9573-13/isomscr.ent"                                             >


<!--                    ISO STANDARD ADDED MATH SYMBOLS 
                           (ARROW RELATIONS)                       -->
<!ENTITY % ISOamsa PUBLIC
"-//W3C//ENTITIES Added Math Symbols: Arrow Relations for MathML 2.0//EN"
"iso9573-13/isoamsa.ent"                                             >


<!--                    ISO STANDARD ADDED MATH SYMBOLS 
                           (BINARY OPERATORS)                      -->
<!ENTITY % ISOamsb PUBLIC 
"-//W3C//ENTITIES Added Math Symbols: Binary Operators for MathML 2.0//EN" 
"iso9573-13/isoamsb.ent"                                             >


<!--                    ISO STANDARD ADDED MATH SYMBOLS 
                           (DELIMITERS)                            -->
<!ENTITY % ISOamsc PUBLIC 
"-//W3C//ENTITIES Added Math Symbols: Delimiters for MathML 2.0//EN"
"iso9573-13/isoamsc.ent"                                             >


<!--                    ISO STANDARD ADDED MATH SYMBOLS 
                           (NEGATED RELATIONS)                     -->
<!ENTITY % ISOamsn PUBLIC 
"-//W3C//ENTITIES Added Math Symbols: Negated Relations for MathML 2.0//EN"
"iso9573-13/isoamsn.ent"                                             >


<!--                    ISO STANDARD ADDED MATH SYMBOLS (ORDINARY) -->
<!ENTITY % ISOamso PUBLIC 
"-//W3C//ENTITIES Added Math Symbols: Ordinary for MathML 2.0//EN"
"iso9573-13/isoamso.ent"                                             >


<!--                    ISO STANDARD ADDED MATH SYMBOLS 
                           (RELATIONS)                             -->
<!ENTITY % ISOamsr PUBLIC 
"-//W3C//ENTITIES Added Math Symbols: Relations for MathML 2.0//EN"
"iso9573-13/isoamsr.ent"                                             >


<!--                    ISO STANDARD MATH ALPHABETS (FRAKTUR)      -->
<!ENTITY % ISOmfrk PUBLIC
"-//W3C//ENTITIES Math Alphabets: Fraktur for MathML 2.0//EN"
"iso9573-13/isomfrk.ent"                                             >


<!--                    ISO STANDARD MATH ALPHABETS (OPEN FACE)    -->
<!ENTITY % ISOmopf PUBLIC
"-//W3C//ENTITIES Math Alphabets: Open Face for MathML 2.0//EN"
"iso9573-13/isomopf.ent"                                             >


<!-- ============================================================= -->
<!--                    ISO SPECIAL CHARACTER SETS INVOKED         -->
<!-- ============================================================= -->


%ISOlat1;
%ISOlat2;
%ISObox;
%ISOdia;
%ISOnum;
%ISOpub;
%ISOcyr1;
%ISOcyr2;

%ISOgrk1;
%ISOgrk2;
%ISOgrk4;

%ISOtech;
%ISOgrk3;
%ISOamsa;
%ISOamsb;
%ISOamsc;
%ISOamsn;
%ISOamso;
%ISOamsr;
%ISOmscr;
%ISOmfrk; 
%ISOmopf;


<!--                    Custom special characters are declared 
                        in a separate module %chars.ent;           -->


<!-- ============ End of XML Special Characters Module =========== -->
