Question

I need to transform one XML (say x1.xml) which is the input to my application to a slightly different XML(say x2.xml) format which is based on the newer version of same schema. x2 is the output from my application. About 90% of elements of x1 and x2 are same as they belong to same schema (just different versions).

What will be the best approach for transformation. I am using java and mule esb.

Answer 1

This is a bread and butter task for XSLT. Start with an identity template rule that by default copies elements across unchanged:

<xsl:template match="*">
 <xsl:copy>
   <xsl:copy-of select="@*"/>
   <xsl:apply-templates/>
 </xsl:copy>
</xsl:template>

and then add further template rules for any elements you want to modify.