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A report model is a system of report elements and their behaviour. JFreeReport offers a general framework for implementing report models. A report model has to cope with two general tasks: (1) To process the report structure and (2) to update or process the data for the report. There are only a limited number of operations one can do to the data-set. As this data processing can be broken down into relatively fixed tasks, the engine provides a fine grained library of functions which should cover all current and future needs of data processing.
Elements of the flow model
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The 'LibLayout' report target treats the evaluation result as a special attribute and forwards this attibute along with all known meta-data to the layouting layer. The content can be formated or processed using the style rule system. The various properties of the DataFlag-object handed to the ReportTarget (including the value itself) get forwarded as attributes to the InputFeed. All these attributes have the namespace 'http://jfreereport.sourceforge.net/namespaces/engine'.
Section
A section is an element that can contain child nodes.
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