Question

My existing xml file looks like

<transaction>
  <id>
    <in>computer</in>
    <sn>1234567</sn>
    <book>JAVA</book>
    <author>klen</author>
  </id>
  <data>
    <dateTime>2011-06-24T17:08:36.3727674+05:30</dateTime>
    <key>Err</key>
  </data>
</transaction>

but I want to add node before <id> node.Now I have 2 question
1.Using dom perser how to add node before ?
2.Is it possible to do this other than dom parser?because I give a demo xml original xml is large so I need a good parser for better performance.

I want to add this

       <xs:schema id="transaction" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">  
    <xs:element name="transaction" msdata:IsDataSet="true" msdata:UseCurrentLocale="true">  
      <xs:complexType>  
        <xs:choice minOccurs="0" maxOccurs="unbounded">  
          <xs:element name="id">  
            <xs:complexType>  
              <xs:sequence>  
                <xs:element name="in" type="xs:string" minOccurs="0" />  
                <xs:element name="sn" type="xs:string" minOccurs="0" />  
                <xs:element name="book" type="xs:string" minOccurs="0" />  
                <xs:element name="author" type="xs:string" minOccurs="0" />  
               </xs:sequence>  
            </xs:complexType>  
          </xs:element>  
          <xs:element name="data">  
            <xs:complexType>  
              <xs:sequence>  
                <xs:element name="dateTime" type="xs:dateTime" minOccurs="0" />  
                <xs:element name="key" type="xs:string" minOccurs="0" />  
              </xs:sequence>  
            </xs:complexType>  
          </xs:element>  
          <xs:element name="productData">  
            <xs:complexType>  
              <xs:sequence>  
                <xs:element name="dateTime" type="xs:dateTime" minOccurs="0" />  
                <xs:element name="key" type="xs:string" minOccurs="0" />  
              </xs:sequence>  
            </xs:complexType>  
          </xs:element>  
        </xs:choice>  
      </xs:complexType>  
    </xs:element>  
  </xs:schema> 

before <id> node under <transaction> node.

Answer 1

Question 1: “Using dom perser how to add node before ?”

Answer 1:
I assume that you are using org.w3c.dom. Let node1 be a Node in your document. Let node2 be another Node in your document. You want to insert node1 before node2.

Question 2: “Is it possible to do this other than dom parser?”

Answer 2: DOM is not the current state of the art with respect to XML. You should look into XSLT, SAX, and or JAXB.