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BUFR has two different ways of encoding information in the data section:
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- Compressed:
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- Each item of information is encoded as a vector with as many elements as the numberOfSubsets in the message
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- Uncompressed:
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- In the message there are as many similar data structures as there are numberOfSubsets.
Each subset is a repetition of the template defined with the unexpandedDescriptors in section 3
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The key compressedData indicates whether the data are compressed (value is 1) or uncompressed (value is 0).
When the BUFR data are compressed each element in the data section is an array with:
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