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XML Data Exchange Using ABAP
Based on a variety of interface examples, readers are provided with highly detailed descriptions of all XML technologies including XML Library, XSLT (with a specific focus on XSLT 2.0 extensions), and Simple Transformations. Volumes of code samples enable you to implement your own data exchange scenarios and select the appropriate technologies to support
them. In addition, readers benefit from best practices for data exchange and from practical guidance on all aspects of software development including specification, testing, data validation via Java integration, and more.
1. Introduction ... 5
2. XML Technologies and Data Exchange ... 7
... 2.1 Important Standards of the XML Family ... 7
... 2.2 Data Exchange in Business Processes ... 9
... 2.3 Using XML Technologies in SAP Systems ... 10
3. XML Library ... 13
... 3.1 Important Interfaces ... 13
... 3.2 Data Sources ... 14
... 3.3 DOM API ... 15
... 3.4 Rendering XML Documents and Encodings ... 17
... 3.5 Validating Against DTDs ... 17
... 3.6 Pitfalls Regarding Namespaces ... 20
... 3.7 Event-Based Parsing ... 23
... 3.8 Useful Tips ... 26
4. XSL Transformations ... 29
... 4.1 Integrating XSLT into the ABAP Workbench ... 29
... 4.2 Integrating XSLT in ABAP ... 31
... 4.3 Transforming ABAP Data ... 36
... 4.4 SAP-Specific Extensions ... 43
... 4.5 XSLT 2.0 Support ... 46
... 4.6 Generating Code ... 50
... 4.7 Useful Tips ... 52
5. Simple Transformations ... 55
... 5.1 Basic Structure ... 55
... 5.2 Accessing Data Objects ... 56
... 5.3 Variables and Parameters ... 61
... 5.4 Conditional Transformations ... 62
... 5.5 Mappings ... 72
... 5.6 Modular Transformation Programs ... 76
... 5.7 Miscellaneous ... 77
... 5.8 Useful Tips ... 79
6. Java Integration ... 81
... 6.1 Validation Using JAXP ... 81
... 6.2 J2EE Infrastructure ... 84
... 6.3 Creating a Web Service for Validating XML Documents ... 85
... 6.4 Using Web Services through ABAP ... 93
... 6.5 Discussing the Solution ... 96
7. Real-Life Scenarios ... 99
... 7.1 Designing Technical Processes ... 99
... 7.2 DP Concept of the Process ... 102
... 7.3 Regression Tests ... 105
A. Sample Scenarios ... 107
... A.1 Sample Master Data Exchange Process ... 107
... A.2 Invoicing via cXML ... 113
B. Bibliography ... 117
Index ... 119
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