Release 10.1A: OpenEdge Development:
Programming Interfaces

Reading before-image data for ProDataSet temp-table buffers from XML

The read and write XML methods support before-image tables in ProDataSets. If the ProDataSet has defined before-image tables, then they will be handled appropriately:

If a ProDataSet has before-tables and the READ-XML() method finds before-image data in the XML data, then that data is read in. Before-image data can be in one of two formats.
Progress before-image format.
Microsoft DiffGram format.
If a static ProDataSet member buffer does not define a before-image table and the XML data contains before-image data for that buffer, then READ-XML() fails.
If the READ-XML() method reads data into a dynamic ProDataSet and detects before-image data for one or more of the temp-table buffers, then the method automatically creates a before-image table for each buffer with before-image data.