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Whats the difference between 4D for Flex and DAX?

April 26, 2017dax difference Flex

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Whats the difference between 4D for Flex and DAX?

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They both target developing RIAs for a 4D Server. But, they really follow two different schemes: 4D for Flex works in a connected mode, without any component on Server side. The communication between the client and the Server relies on a proprietary SQL protocol (same as the one used for ODBC support for 4D SQL), so it requires opening a special port on firewalls for allowing communication.