| Created: | 08/08/2012 12:04:16 PM |
| Modified: | 29/04/2016 2:13:37 PM |
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The «CodeList» class 'StatisticalFunctionCode' specifies the type of statistical function that is applied to the base observable property to define the statistical summary; e.g. maximum air temperature.<br/><br/>Note that WMO provides two code-tables listing statistical operators: <br/>- WMO No. 306 Vol I.2 Part B FM 92 GRIB code-table 4.10 'Type of statistical processing'; and<br/>- WMO No. 306 Vol I.2 Part B FM 94 BUFR code-table 0 08 023 'First-order statistics'<br/><br/>The GRIB2 code-table is defined as the 'recommended' vocabulary for this «CodeList» class but lacks some of the necessary terms. For example, the GRIB code-table includes 'Average' but does not include 'Mean', 'Mode' or 'Median' (which can be found in the BUFR code-table). However, the BUFR code-table is _NOT_ chosen because 'Accumulation' is entirely missing. Given that 'extensibility' is set to 'any', authors are free to refer to their preferred 'statistical operator' vocabulary. The GRIB code-table is only a recommendation. <br/>
- Tagged Values
| Tag | Value |
| asDictionary | true |
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Values: true | false
Default: true Description: Encode code list as externally managed dictionary (applies to ISO 19136:2007 encoding rule). |
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| extensibility | none |
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Details:
Values: none | narrower | open | any
Default: none Description: This refers to extensions by a third party, not to extensions by the owner of the vocabulary; the owner will always be able to revise the vocabulary. I.e., if the value is 'none', the referenced vocabulary may not be extended by third parties; if the value is 'narrower', the vocabulary may be extended by narrower terms that have an existing term as a parent; if the value is 'any', the vocabulary may be extended by additional terms on any level. This value must be 'all', empty or missing, if the value 'vocabulary' is empty or missing; in this case any vocabulary may be used. |
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| vocabulary | http://codes.wmo.int/grib2/codeflag/4.10 |
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Details:
Description: URI of the vocabulary/code list in the WMO Codes Registry or in some external registry. The value has to be provided, if an online version of the vocabulary is used.
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