Input data validations using Transform activity, DVM and REGEX using XSLT in Oracle SOA Suite 11g

Let me show you how to write sample xsl code for Email address validations using regex(Regular expression) and DVM(Domain value map) in Oracle BPM

1. After template match="/" create a variable called REGEX

<xsl:variable name="REGEX" select='dvm:lookupValue1M("oramds:/apps/common_artifacts/dvm/validation.dvm","Error","EMAIL_REGEX","condition")'/>

2.  Use the following template to do the validations.

<xsl:if test="not(string-length(normalize-space(string(/inp1:request/inp1:emailAddress))) = 0) and not(string-length(normalize-space(string(/inp1:request/inp1:emailAddress))) > 5)">
      <xsl:if test="not(xpath20:matches(/inp1:request/inp1:emailAddress,$REGEX))"> 
<ns1:errCod>                                                                                                                                                                  
       <xsl:value-of select='dvm:lookupValue1M("oramds:/apps/common_artifacts/Mappings.dvm","ProcessErrorCode","3","code")'/>
          </ns1:errCod>
      </xsl:if>
 </xsl:if>