ISO 8583 OpenWay POS dialect

ISO 8583 OpenWay POS dialect messages was defined.

The functionality of messages cover common POS terminal transaction flows.
Simple Financial messages are supported by this specification.

Messages based on ISO8583-1987 standard format.
Data Elements inside the message delimited with specific Field Separators.

OpenWay POS messages parser added into environment with few top levels descriptions.
There are no enough messages samples to test it for all cases.
Please contact to to improve the definitions.

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