Diff of /ru/maxima-tarnavsky-6-diff.xml [4aa44b] .. [1f6f15] Maximize Restore

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--- a/ru/maxima-tarnavsky-6-diff.xml
+++ b/ru/maxima-tarnavsky-6-diff.xml
@@ -1,7 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="../main.xsl"?>
-<html xmlns="http://www.w3.org/1999/xhtml" id="maxima-tarnavsky-5" xml:lang="ru">
-<head><title>Тихон Тарнавский. Пишем свой diff()</title></head>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" id="maxima-tarnavsky-6-diff" xml:lang="ru">
+<head>
+    <title>Тихон Тарнавский. Пишем свой diff()</title>
+    <link rel="schema.DC" href="http://purl.org/dc/elements/1.1/"/>
+    <link rel="schema.DCTERMS" href="http://purl.org/dc/terms/"/>
+    <meta name="DC.identifier" scheme="DCTERMS.URI" content="http://maxima.sourceforge.net/ru/maxima-tarnavsky-6-diff.html"/>
+</head>
 
 <body>