On 26/01/2024 16:01, Roger L Costello costello@xxxxxxxxx wrote:
Hi Folks,
My XML document contains an element named RNP (Required Navigation
Performance, which is the required performance of an aircraft, measured in
nautical miles).
Its value is three digits, e.g.,
<RNP>152</RNP>
The value is encoded. I need an XPath expression which decodes it.
If the first digit is non-zero, then the decoding is: the first two digits,
decimal point, the last digit.
In the example above, the first digit is 1, so it is decoded to 15.2
152 -> decode -> 15.2
(the aircraft's required performance is 15.2 NM).
If the first digit is zero, then the decoding is: the third digit represents
the number of places to the right of the decimal point, e.g.,
010 -> decode -> 1
011 -> decode -> 0.1
012 -> decode -> 0.01
013 -> decode -> 0.001
014 -> decode -> 0.0001
015 -> decode -> 0.00001
016 -> decode -> 0.000001
017 -> decode -> 0.0000001
018 -> decode -> 0.00000001
019 -> decode -> 0.000000001
Looks like a mathematical operation
B if (starts-with(., '0')) then xs:integer(substring(., 1, 2)) div
math:pow(10, xs:integer(substring(., 3))) else . div 10
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