<!ELEMENT BIB o o (E)+>
<!ELEMENT E - - (T+, A*, PP*, PN*, D+, ED?, SE*, N*, C+, K*, L*, COPY+) >

<!-- I.e. entry contains:

   T (title)   1 or more
   A (author)  0 or more
   PP (publ. place) 0 or more
   PN (publ. name)  0 or more
   D  (date)   1 or more
   ED (edition) 0 or 1
   SE (series) 0 or more
   N  (note) 0 or more
   C  (class number) (1 or more)
   K  (keyword)  0 or more
   L  (language) 0 or more
   COPY (copy info) 1 or more. If only one copy, COPY tag itself may be omitted. -->

<!ATTLIST E S CDATA #IMPLIED>
<!ATTLIST D T CDATA #IMPLIED>

<!-- I.e. D (date) may have a T (type) attribute. Values used
include T="c" (copyright date), T="o" (original date for a reprint),
T="r" (reprint date??) -->

<!ELEMENT (T|P) - - (#PCDATA | I)*>
<!ATTLIST T T CDATA #IMPLIED
            NS   CDATA #IMPLIED>


<!-- I.e. T (title) has two attributes, T (type), used
mostly for T="u" (uniform title) or T="a" (alternative
title); and NS (nonsort), used for nonsorting articles,
etc., e.g. NS="The " -->

<!ELEMENT A - - (#PCDATA | R)*>

<!-- I.e. author (A) may contain statement of role (R), 
e.g. Smith, Jeremy {R}ed.{/R} -->

<!ELEMENT (PP|PN|D|SP|SN|SD|I|V|C|L|PR|K|R|ED) - - (#PCDATA)>
<!ATTLIST PR U (usd|ukp|irp|dm|cnd|aud) "usd">

<!-- Price (PR) has unit (U) attribute, which may be 
usd (US dollars), ukp (UK pounds), irp (Irish pounds),
dm (Deutsch marks), or cnd (Canadian dollars). Euros
may be added later. Default is usd -->

<!ELEMENT SE - - (#PCDATA | V)*>
<!ATTLIST SE NS CDATA #IMPLIED>
<!ELEMENT COPY o o (SP, SN, SD, PR, B, CN*)>

<!-- I.e., COPY contains a series of required elements
in a required order, one of each: SP (source place), SN (source
name), SD (source date), PR (price), B (binding), followed
optionally by any number of copy notes (CN) -->

<!ATTLIST COPY V CDATA #IMPLIED
               C CDATA #IMPLIED
               S CDATA #IMPLIED
               I CDATA #IMPLIED
               O (r|p) "p">
               
<!-- i.e. volume, copy, status, issue, ownership -->

<!ELEMENT B - - (#PCDATA)>
<!ELEMENT (N|CN) - - (#PCDATA | I | P)*>
<!ENTITY % MEDsel1 PUBLIC "MEC 1998-1//ENTITIES MED 1//EN">
%MEDsel1;
<!ENTITY % ISOlat1 PUBLIC "ISO 8879-1986//ENTITIES Added Latin 1//EN">
%ISOlat1; 

<!ENTITY % ISOlat2 PUBLIC "ISO 8879-1986//ENTITIES Added Latin 2//EN">
%ISOlat2; 

<!ENTITY % ISOnum PUBLIC "ISO 8879-1986//ENTITIES Numeric and Special Graphic//EN">
%ISOnum;

<!ENTITY % ISOpub PUBLIC "ISO 8879-1986//ENTITIES Publishing//EN">
%ISOpub; 

<!ENTITY acute  SDATA "[acute ]"--=acute accent-->