Program GTX20 performs a match to Sovos by returning a 9-byte key that matches the input address to Sovos data.
The 9-byte Sovos SUT key consists of:
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2-byte cross-reference state
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5-byte ZIP Code
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2-byte Sovos geocode.
The 9-byte Sovos TWE key consists of:
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variable-length TWE geocode
To work with the cross-reference file, you must be a licensed user of Sovos products.
GTX20 is called only from the program GTMATCH, simplifying all subsequent calls from other programs or applications.