diff --git a/list.py b/list.py
new file mode 100644
index 0000000..787e20a
--- /dev/null
+++ b/list.py
@@ -0,0 +1,25 @@
+#! usr/bin/env python
+import optparse, libxml2, sys
+	
+def validate(xml_file, dtd_file):
+	doc = libxml2.parseFile(xml_file)
+	dtd = libxml2.parseDTD(None, dtd_file)
+	ctxt = libxml2.newValidCtxt()
+	ret = doc.validateDtd(ctxt, dtd)
+	dtd.freeDtd()
+	doc.freeDoc()
+	return ret
+	
+	
+def main():
+	op = optparse.OptionParser(description = U"check", prog = "dtd", version = "0.1", usage = U"%prog")
+	op.add_option("-x", "--xml", dest = "xml", help = U"XML Doc", metavar = "XML_FILE")
+	op.add_option("-d", "--dtd", dest = "dtd", help = U"DTD Doc", metavar = "DTD_FILE")
+	options, arguments = op.parse_args()
+	if options.xml and options.dtd:
+		validate(options.xml, options.dtd)
+	else:
+		op.print_help()
+		
+if __name__ == "__main__":
+	main()
diff --git a/mephi.dtd b/mephi.dtd
new file mode 100644
index 0000000..cd65218
--- /dev/null
+++ b/mephi.dtd
@@ -0,0 +1,9 @@
+<!ELEMENT University (faculty+)>
+<!ELEMENT faculty (caf+)>
+<!ELEMENT caf (group+)>
+<!ELEMENT group (student+)>
+<!ELEMENT student (#PCDATA)>
+<!ATTLIST University name CDATA #REQUIRED>
+<!ATTLIST faculty name CDATA #REQUIRED>
+<!ATTLIST caf number CDATA #REQUIRED>
+<!ATTLIST group number CDATA #REQUIRED>
diff --git a/mephi.xml b/mephi.xml
new file mode 100644
index 0000000..b75bc67
--- /dev/null
+++ b/mephi.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE University SYSTEM "mephi.dtd">
+<University name = "MEPhI">
+   <faculty name = 'K'>
+      <caf number = "36">
+         <group number = "362">
+            <student>Molochkov</student>
+            <student>Ivanov</student>
+            <student>Petrov</student>
+	     </group>
+         <group number = "361">
+	        <student>Titorenko</student>
+	        <student>Sidorov</student>
+	        <student>Ryabov</student>
+	     </group>
+	  </caf>
+   </faculty>   
+</University>
+		 
+