The XML Component In Context

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The repository stores well-structured information about application data. You can use the XML component to export table data along with XML elements that describe this table data. This way, you create conceptually rich export data.

You can also import an XML document and process instructions that are included in this document. In this case, the Rules Engine acts as an XML agent. The way in which XML data is processed is equivalent to SQL based data manipulation.

The Rules Engine uses the concept of data domains. In XML, the corresponding concept is expressed in Document Type Definitions (DTD's) or, more recently, in XML Schemas. The USoft XML component makes it possible to create DTD documents that contain these domain definitions.

All XML conversion facilities can be used by batch-oriented processes, by interactive processes, or via the Remote Rules Service API.

Figure 18-1: Data Exchange Between Application Tables and XML

This figure shows the principle of data exchange between USoft application tables and XML. This way you can communicate with other applications that support XML. When importing XML data, the Rules Engine checks all rules.