Grouping XML Messages using custom XSLT- BizTalk 2010

Thought of writing this post after seeing multiple questions being asked about it on MSDN Forums


Scenario: We receive Xml message which has details spread across multiple nodes and we want to Consolidate/Group the related details to single node.


Input:

Output:

What we need to achieve this:

We need a map and in map we use custom XSLT.

No mapping/link is  visible on the mapping grid as its done in background  by XSLT which we provide.
We can do linking even after providing custom XSLT with no errors but the output will be based on the XSLT and not linking.
To tell map to apply XSLT we need to set a property Custom XSLT Path to the location where we have our XSLT.

Now lets have a look at the XSLT which we will apply here.

Grouping is done with the  help of key function  and generateId  function . It is also referred as Muenchian method.

In it we group all the Item records coming as an individual but having same Order Id.

In xslt we first create a key and initialize it, which holds the uniqueId which is generated and based on incoming first OrderID.

<xsl:key use="OrderID" match="/s0:Orders/Order1/Order" name="groups"/>

 And we compare this with the rest of the OrderId from incoming message .

<xsl:for-each select="Order1/Order[generate-id(.)=generate-id(key('groups',OrderID))]">

If match found then an output node is created with  Item records  having same OrderID . This will group all the items which belong to the same order.

<xsl:for-each select="key('groups',OrderID)">

If not then new uniqueId is created for that node  and again checked through all the incoming nodes.

Download sample 

Grouping XML using custom XSLT

Will keep on posting as an when I find something to share!!!!!!!!!!!!