Grouping tags based on Condition +XSLT

Here we are going to discus about how to group the tags under some condition in xslt. I will explain this by taking the Employer example.
        Before this we need to know some of the xslt functions and template calling .

• generate-id()
• key()
• <xsl:key>
• <xsl:template>

Suppose we have one xml which is having many number of branches in a company .Each branch has many number of employees. The xml looks like this.

<?xml version="1.0" ?>

<Employees>

<Employee>

<TeamID>1</TeamID>

<TeamName>Sales</TeamName>

<TaskID>1</TaskID>

<Hours>5</Hours>

<EmployeeID>1</EmployeeID>

<Name>Bob</Name>

<Surname>Shibob</Surname>

</Employee>

<Employee>

<TeamID>1</TeamID>

<TeamName>Sales</TeamName>

<TaskID>2</TaskID>

<Hours>4</Hours>

<EmployeeID>1</EmployeeID>

<Name>Bob</Name>

<Surname>Shibob</Surname>

</Employee>

<Employee>

<TeamID>1</TeamID>

<TeamName>Sales</TeamName>

<TaskID>4</TaskID>

<Hours>7</Hours>

<EmployeeID>2</EmployeeID>

<Name>Sara</Name>

<Surname>Lee</Surname>

</Employee>

<Employee>

<TeamID>2</TeamID>

<TeamName>Finance</TeamName>

<TaskID>5</TaskID>

<Hours>2</Hours>

<EmployeeID>3</EmployeeID>

<Name>John</Name>

<Surname>Smith</Surname>

</Employee>

<Employee>

<TeamID>2</TeamID>

<TeamName>Finance</TeamName>

<TaskID>3</TaskID>

<Hours>4</Hours>

<EmployeeID>4</EmployeeID>

<Name>Penny</Name>

<Surname>Wise</Surname>

</Employee>

<Employee>

<TeamID>2</TeamID>

<TeamName>Finance</TeamName>

<TaskID>5</TaskID>

<Hours>3</Hours>

<EmployeeID>4</EmployeeID>

<Name>Penny</Name>

<Surname>Wise</Surname>

</Employee>

</Employees>

To do this

·        First declare the one key variable

<xsl:key name=" keyEmployeeID" match="Employee" use=" EmployeeID"/>

·        Then write a for loop for iterating the Employee set

<xsl:for-each select="Employee”>

·        Then generate and id for each key value of employes

<xsl:for-each select="…………generate-id(key('keyEmployeeID', EmployeeID)[1])]">

·        Assign all this ids in to a array

<xsl:for-each select="tEmployee[generate-id(.) = generate-id(key('keyEmployeeID', EmployeeID)[1])]">