diff --git a/src/coverage-04.dtd b/src/coverage-04.dtd
new file mode 100644
index 0000000..e5a21bb
--- /dev/null
+++ b/src/coverage-04.dtd
@@ -0,0 +1,60 @@
+<!-- Portions (C) International Organization for Standardization 1986:
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+-->
+
+<!ELEMENT coverage (sources?,packages)>
+<!ATTLIST coverage line-rate        CDATA #REQUIRED>
+<!ATTLIST coverage branch-rate      CDATA #REQUIRED>
+<!ATTLIST coverage lines-covered    CDATA #REQUIRED>
+<!ATTLIST coverage lines-valid      CDATA #REQUIRED>
+<!ATTLIST coverage branches-covered CDATA #REQUIRED>
+<!ATTLIST coverage branches-valid   CDATA #REQUIRED>
+<!ATTLIST coverage complexity       CDATA #REQUIRED>
+<!ATTLIST coverage version          CDATA #REQUIRED>
+<!ATTLIST coverage timestamp        CDATA #REQUIRED>
+
+<!ELEMENT sources (source*)>
+
+<!ELEMENT source (#PCDATA)>
+
+<!ELEMENT packages (package*)>
+
+<!ELEMENT package (classes)>
+<!ATTLIST package name        CDATA #REQUIRED>
+<!ATTLIST package line-rate   CDATA #REQUIRED>
+<!ATTLIST package branch-rate CDATA #REQUIRED>
+<!ATTLIST package complexity  CDATA #REQUIRED>
+
+<!ELEMENT classes (class*)>
+
+<!ELEMENT class (methods,lines)>
+<!ATTLIST class name        CDATA #REQUIRED>
+<!ATTLIST class filename    CDATA #REQUIRED>
+<!ATTLIST class line-rate   CDATA #REQUIRED>
+<!ATTLIST class branch-rate CDATA #REQUIRED>
+<!ATTLIST class complexity  CDATA #REQUIRED>
+
+<!ELEMENT methods (method*)>
+
+<!ELEMENT method (lines)>
+<!ATTLIST method name        CDATA #REQUIRED>
+<!ATTLIST method signature   CDATA #REQUIRED>
+<!ATTLIST method line-rate   CDATA #REQUIRED>
+<!ATTLIST method branch-rate CDATA #REQUIRED>
+
+<!ELEMENT lines (line*)>
+
+<!ELEMENT line (conditions*)>
+<!ATTLIST line number CDATA #REQUIRED>
+<!ATTLIST line hits   CDATA #REQUIRED>
+<!ATTLIST line branch CDATA "false">
+<!ATTLIST line condition-coverage CDATA "100%">
+
+<!ELEMENT conditions (condition*)>
+
+<!ELEMENT condition EMPTY>
+<!ATTLIST condition number CDATA #REQUIRED>
+<!ATTLIST condition type CDATA #REQUIRED>
+<!ATTLIST condition coverage CDATA #REQUIRED>