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XML-based archiving involves two logically separate systems, which are generally also physically separate: The application system whose database is to be cleaned up and which contains the data to be archived, and the archiving system in which the XML Data Archiving Service is running. XML-based Archiving is available in two flavors: ABAP and JAVA.

The application system contains another important component for XML archiving, called the XML DAS Connector. If you are working with an ABAP application system the XML DAS Connector for ABAP contains the XML Archive API as well as the local archive administration, transaction SARA.

If you are working with a JAVA application system, the XML DAS Connector for JAVA currently only contains the XML Archive API for JAVA as J2EE Library. You must use the application-specific user interfaces for archiving (two JAVA XML archiving sets: XI_SEC and XI_AF_MSG). (The archiving programs of an XML archiving object use the XML Archive API for ABAP, which communicates with XML DAS using HTTP(s).)

The XML Data Archiving Service is part of the SAP J2EE Engine, which means that the archiving takes place on the JAVA stack of an SAP Web Application Server for both ABAP and JAVA. The meta data and the property indexes (used for value-based searches) are kept in the database of the J2EE Engine, while the actual data that is archived is saved in a storage system connected via the WebDAV protocol. Alternatively, you can also use a robust file system, which must be made available to all servers of the SAP J2EE Engine. The file system or rather, a part of it (folder or WebDAV collection) is used as an archive store defined via the XML DAS Administration. Because these and other settings are cross-application-system settings, the Structure linkXML DAS Administration is part of the SAP J2EE Engine and must be configured for XML data archiving for ABAP as well as JAVA.

The following figure shows how all of these components fit together:

 

This graphic is explained in the accompanying text

Figure 1: Relationship of the Different Components in XML-Based Archiving

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