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Reading Order (IMPACT) #18
Additional processing software or manual intervention may add correct this problem. ALTO has to store the reading order explicitly. The reading order should not rely on the order of XML elements in the ALTO file.
•unordered (information flow doesn’t have a particular order) or
In order to represent complex information flows within a page groups may have an unlimited number of sub-groups. The sub-groups are of the type ordered and unordered groups. Both types of groups may have any type of sub-groups.