Abstract: Transforming source data in a source markup language to target data in a target markup language using transformation rules mapping source tags to corresponding target tags. In an embodiment, the tags in the source data (e.g., XML) are retrieved sequentially (e.g., by SAX parser) and hierarchical memory objects (e.g., DOM objects) are created for a source tag matching a transformation rule immediately upon reading the source tag. A portion of the target data corresponding to the source tag is then generated from the hierarchical memory objects. The hierarchical memory object may be removed from the memory once the corresponding portion of the target data is generated. As a result, the memory requirements may be reduced.

Abstract: In order to parse a flat file to create an XML instance, information about the data and its hierarchy is captured in an XML schema definition. Once the data structure is defined in the Schema, the parsing instructions for the flat file are introduced in the schema so that after producing an XML instance from a schema definition, the instance may be populated with live data from the flat file.