BizTalk, Another Custom XSLT mapping sample.

The below mapping example could most likely be accomplished using a series of BizTalk maps. In the maps,  Table Looping / Table Extractor / Looping functoids etc. could be used to perform the transformation. Sometimes it makes sense to craft your own custom XSLT to execute the complete transformation. The sample input / output messages for the transformation as below. Also included is the custom XSLT for the transformation. You can also download the source code (at end of this blog entry). 

INPUT Message:

--> For each "contenedor" node, in the output message must repeat the sequence of segments ORC + RQD (According to the standard HL7 v.2.3.1)
--> For each "prueba" node, in the output message must repeat the sequence of segments ORC + OBR
--> For each "parametro" node, in the output message must repeat the segment NTE

For the below output, the order of the nodes is also important. The order relates back to the input message.

OUTPUT Message should be:

MSH||||.|
ORC||||.|
RQD||||.|
ORC||||.|
RQD||||.|
ORC||||.|
OBR||||.|
NTE||||.|
NTE||||.|
ORC||||.|
OBR||||.|
NTE||||.|
NTE||||.|
NTE||||.|

The custom XSLT for the mapping/transformation looks like below:

The above XSLT can be placed in a scripting functoid in the map as discussed HERE
Or the custom XSLT can be placed in a separate file, with the map's property ->  Custom XSLT Path pointing to the file (see below)

Download the solution HERE

Conclusion: In some cases it is much simpler to write your own custom XSLT for a BizTalk map.
Note: You can also perform a transformation in a BizTalk map using a combination of custom XSLT and links/functoids (see below links)
Note: Using functoids or a combination of functoids in a map are sometimes not enough to perform a transformation or a portion of a transformation. Using custom XSLT for the transformation or a portion of the transformation may be the answer.

Below is more information on using custom XSLT in BizTalk maps:

Extending Mapper (BizTalk Server SDK Samples)

Creating Nodes from Flat Data in BizTalk 2004 Maps

Logical Message Splitting in BizTalk Server 2004

Implementation of Message Transformation Normaliser Pattern in the BizTalk 2004

Sorting XML Nodes with the BizTalk Mapper

Debugging XSLT