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Implementation of Node functions
is the most frequently needed when mapping IDoc structure to file structure. Lot
of times we come across a scenario where the fields (occurrence=0) are not
mandatory in the IDocs are not populated in the source XML and they are required
in the target XML (occurrence =1) which gives a mapping run time exception that
target element cannot be created. We can handle the error by checking whether
the source tag exists and if it does not we can pass an empty value, which
generates the required target field.
depicts exists functionality. ID (source field) is checked for its existence by
using exists function.
depicts the existence of ID (source field), so same value is populated in target
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