<!DOCTYPE XYZ-article
      PUBLIC "-//XYZ//Simple Article//EN"
             "article.dtd" [
<!ENTITY % Doctype   "XYZ-article">
<!ENTITY % Front     "XYZ-front">
<!ENTITY % Body      "XYZ-body">
<!ENTITY % Back      "XYZ-back">
<!ENTITY % Title     "XYZ-title">
<!ENTITY % Author    "XYZ-author">
<!ENTITY % Date      "XYZ-date">
<!ENTITY % Publisher "XYZ-publisher">
<!ENTITY % Copyright "XYZ-copyright">
<!ENTITY % Part      "XYZ-part">
<!ENTITY % Paragraph "XYZ-paragraph">
<!ENTITY % Number    "XYZ-number">
<!ENTITY % Notes     "XYZ-notes">
<!ENTITY % Appendix  "XYZ-appendix">
<!ENTITY % their-dtd SYSTEM "their-dtd.dtd">
%their-dtd;
]>

Note: Fragment for illustration purposes only

