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On 21/12/2022 13:25, Roger L Costello wrote: I have a program that processes XML files in a folder. Some of the XML documents contain data about a car, [...] At some point I think, the wrong point. the program reads in that XML document and begins processing it. The objective of processing is to output the license plate number if the car is stolen and "" (not stolen) otherwise. However, the document does not contain the necessary information to make that decision. This looks like a case of putting the cart before the horse. The conventional sequence of processing would be more likely to start by processing a police report. It looks up the car in the documents in the folder about cars. If there is a match, then perform whatever action is required, then go onto the next police report until they are all finished, then stop and wait for more police reports to arrive.So the desired processing behavior is this: I see no benefit in processing this back-to-front. Peter
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