Q5

<?xml version="1.0" encoding="UTF-8"?>
<title-author>
   <title>TCP/IP Illustrated</title>
   <author>
      <last>Stevens</last>
      <first>W.</first>
   </author>
</title-author>
<title-author>
   <title>Advanced Programming in the Unix environment</title>
   <author>
      <last>Stevens</last>
      <first>W.</first>
   </author>
</title-author>
<title-author>
   <title>Data on the Web</title>
   <author>
      <last>Abiteboul</last>
      <first>Serge</first>
   </author>
</title-author>
<title-author>
   <title>Data on the Web</title>
   <author>
      <last>Buneman</last>
      <first>Peter</first>
   </author>
</title-author>
<title-author>
   <title>Data on the Web</title>
   <author>
      <last>Suciu</last>
      <first>Dan</first>
   </author>
</title-author>


Q6
<?xml version="1.0" encoding="UTF-8"?>
<publisher>
   <name>Addison-Wesley</name>
   <book>
      <year>1994</year>
      <title>TCP/IP Illustrated</title>
      <author>
         <last>Stevens</last>
         <first>W.</first>
      </author>
   </book>
   <book>
      <year>1992</year>
      <title>Advanced Programming in the Unix environment</title>
      <author>
         <last>Stevens</last>
         <first>W.</first>
      </author>
   </book>
</publisher>
<publisher>
   <name>Morgan Kaufmann Publishers</name>
   <book>
      <year>2000</year>
      <title>Data on the Web</title>
      <author>
         <last>Abiteboul</last>
         <first>Serge</first>
      </author>
      <author>
         <last>Buneman</last>
         <first>Peter</first>
      </author>
      <author>
         <last>Suciu</last>
         <first>Dan</first>
      </author>
   </book>
</publisher>
<publisher>
   <name>Kluwer Academic Publishers</name>
   <book>
      <year>1999</year>
      <title>The Economics of Technology and Content for Digital TV</title>
   </book>
</publisher>