Having seen so many forums dealing with the mapping concepts & Techniques, Mapping errors and how to use various mapping in XI, I thought of preparing a consolidated list of all the mapping blogs which will be helpful to all the developer. I would like to thank all the contributors for providing these many blogs on the mapping concepts.
These links provided below will deal with various techniques that are handled in mappings.
Simple java code in graphical mapping - XI https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1321
GlobalContainer - in graphical mapping (XI) https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1352
XI: How to test your mapping (in real life scenarios) https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2374
XI: XML node into a string with graphical mapping? https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2620
Sending Java code as payload to do mapping in XI https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2835
Skelton of Mapping Runtime in SAP XI Did we bother to understand why the RFC Destination AI_RUNTIME_JCOSERVER is very important https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/5404
Accessing System Parameters in Mapping Runtime https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/5336
Message Mapping Simplified - Part II NODE FUNCTIONS https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2171 https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2792
Limitations of Message Mapping Editor in XI-Can we make it user-friendlier? https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2775
The Use of "suppress" in the XI 3.0 Graphical Mapping Tool https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2989
New functions in the Graphical Mapping Tool SP13 https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2458
SAP PI 7.1 Mapping Enhancements Series: Correct Structural Inconsistencies https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/8662
SAP PI 7.1 Mapping Enhancements Series: Graphical Support for JDBC and RFC Lookups https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/8661
SAP PI 7.1 Mapping Enhancements Series: Parameterized Message Mappings https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/8654
SAP NetWeaver Process Integration 7.1: Mapping Enhancements Blog Series https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/8650
SAP PI 7.1 Mapping Enhancements Series: Mapping Enhancements Demo https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/8282
SAP PI 7.1 Mapping Enhancements Series: Copy XML Subtree https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/8649
SAP PI 7.1 Mapping Enhancements Series: Using Graphical Variable https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/8638
SAP PI 7.1 Mapping Enhancements Series: Share User-Defined Functions https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/7331
SAP PI 7.1 Mapping Enhancements Series: Import SQL Table's Metadata https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/7346
Using Folders in PI 7.1 https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/7010
TechEd 2006: EPI351 - Graphical Mapping Tool-Advanced Message Mapping https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/4294
Minimize memory usage during Message Mapping when replicating an element https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/3362
New Arithmetic and Statistical Functions in Message Mappings in SP18 https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/4277
Never, ever use XI's built-in arithmetic functions https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/3446
Sequence Number Generation: Mapping Pattern in PI https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/8345
Summarization: Mapping Pattern in PI https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/8336
Message Mapping - using of E1BPPAREX => experience in the aspect of maintenance and customer usability https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/7915
Duplicating Sub trees and Numbering Them Using the Graphical Mapping Tool https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/4052
Message Splitting Using the Graphical Mapping Tool https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/3765
Replication of Nodes Using the Graphical Mapping Tool https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/3468
Standard functions in message mapping http://help.sap.com/saphelp_nw04/helpdata/en/43/c4cdfc334824478090739c04c4a249/frameset.htm
New Arithmetic and Statistical Functions in Message Mappings in SP18 https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/4277
Hack: Using XPATH in XI Message Mappings https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/5418
Message mapping verification https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/4445
Mapping Context Changes in XI https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/5210
Mapping trouble shooting https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/e01e9400-9e81-2910-20a5-a862945a5e98
Mapping Context Changes in XI https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/5210
File Content Conversion for Multi Hierarchical Structure
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/7154
Number formatting to handle LARGE Numbers
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2554
Optimizing Lookup's in XI
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2781
Data Mining using APriori Algorithm in XI - Part I, II & III
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2852
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2934
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/2715
Java Mapping to handle flat files in SAP XI
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/5242
xpath functions in xslt mapping
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/3416
"JAVA MAPPING", an alternate way of reading a CSV file
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/4018
B2B Mapping Techniques Using the Graphical Mapping Tool
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/3666
How to parse "XX/YY/ZZ;AA/BB/CC;11/22/33" in message mapping https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/4963
Introduction to queues in message mapping
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1832
ValueMapping using the Graphical Mapping Tool
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/5479
Accessing Value Mapping defined in Directory using Java functions
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/4702
Multi-Mapping without BPM - Yes, it's possible!
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/3115
Designing Mapping:
http://help.sap.com/saphelp_nw04/helpdata/en/d2/58cd3b11571962e10000000a11402f/content.htm
User-Defined Functions
http://help.sap.com/saphelp_nw04/helpdata/en/22/e127f28b572243b4324879c6bf05a0/content.htm
Standard Functions
http://help.sap.com/saphelp_nw04/helpdata/en/43/c4cdfc334824478090739c04c4a249/content.htm
Runtime Procedure
http://help.sap.com/saphelp_nw04/helpdata/en/3d/24e15bf9d79243b45d49b13b03de8f/content.htm
Mapping Fields Within a Context
http://help.sap.com/saphelp_nw04/helpdata/en/e4/82cf0ec8b9494db92e27e2be69524f/content.htm
Structure Mapping by Setting the Context
http://help.sap.com/saphelp_nw04/helpdata/en/bd/ca1105c81c6742a0f8c8d49f8834bf/content.htm\\
Comparing Performance of Mapping Programs