Text model design of product master data in SAP CRM

SAP CRM product Master Data designs these different types of text models:

Part1 and Part2 actually share the same assignment block COMM_PR_SHTEXT. That means if you change text in Part1 ( part2 ), the change will automatically be displayed in part2 ( part1 ). The only difference is in part2, you can maintain text with different language but in part1 you can only maintain with log on language. Part3 is implemented via set type COMM_PR_LGTEXT1. Part4 is organization dependent text, Implemented via settype COMM_PR_LGTEXT2. Relationship between settype and BOL relation: Part1 and Part2:

since if log on laugage is specified ,exactly one short text can be determined. This is reason why child carinality is 0.. 1 in second case. Part3:

Part4: Product->ProductDistrChain->ProductDcLongtext

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