@prefix qudt:  <http://qudt.org/schema/qudt#> .
@prefix ssd:   <http://www.w3.org/ns/sparql-service-description#> .
@prefix owl:   <http://www.w3.org/2002/07/owl#> .
@prefix xsd:   <http://www.w3.org/2001/XMLSchema#> .
@prefix skos:  <http://www.w3.org/2004/02/skos/core#> .
@prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> .
@prefix qudt-unit: <http://qudt.org/vocab/unit#> .
@prefix qb:    <http://purl.org/linked-data/cube#> .
@prefix dgu:   <http://reference.data.gov.uk/def/reference/> .
@prefix ui:    <http://purl.org/linked-data/registry-ui#> .
@prefix dct:   <http://purl.org/dc/terms/> .
@prefix reg:   <http://purl.org/linked-data/registry#> .
@prefix qudt-quantity: <http://qudt.org/vocab/quantity#> .
@prefix grib2-parameter: <http://codes.wmo.int/grib2/schema/parameter/> .
@prefix api:   <http://purl.org/linked-data/api/vocab#> .
@prefix vann:  <http://purl.org/vocab/vann/> .
@prefix prov:  <http://www.w3.org/ns/prov#> .
@prefix foaf:  <http://xmlns.com/foaf/0.1/> .
@prefix common-unit: <http://codes.wmo.int/common/schema/unit/> .
@prefix cc:    <http://creativecommons.org/ns#> .
@prefix grib2-core: <http://codes.wmo.int/grib2/schema/core/> .
@prefix void:  <http://rdfs.org/ns/void#> .
@prefix version: <http://purl.org/linked-data/version#> .
@prefix bufr4-core: <http://codes.wmo.int/bufr4/schema/core/> .
@prefix rdf:   <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix ldp:   <http://www.w3.org/ns/ldp#> .
@prefix time:  <http://www.w3.org/2006/time#> .
@prefix qudt-dimension: <http://qudt.org/vocab/dimension#> .
@prefix vs:    <http://www.w3.org/2003/06/sw-vocab-status/ns#> .
@prefix common-core: <http://codes.wmo.int/common/schema/core/> .
@prefix dc:    <http://purl.org/dc/elements/1.1/> .

<http://codes.wmo.int/iwxxm/nil/inapplicable>
        a                skos:Concept ;
        rdfs:label       "Inapplicable"@en ;
        rdfs:seeAlso     <http://www.opengis.net/doc/gml#clause-8.2.3.1> ;
        dc:source        "ISO 19136:2007 Geographic information - Geography Markup Language sub-clause 8.2.3.1"@en ;
        dct:description  "There is no value."@en ;
        owl:versionInfo  <http://icao.int/iwxxm/2025-2> ;
        skos:notation    "inapplicable" .

<http://codes.wmo.int/iwxxm/nil/AboveDetectionRange>
        a                skos:Concept ;
        rdfs:label       "Above detection range"@en ;
        dct:description  "The value was above the detection range of the instrument used to estimate it."@en ;
        owl:versionInfo  <http://icao.int/iwxxm/2025-2> ;
        skos:notation    "AboveDetectionRange" .

<http://codes.wmo.int/iwxxm/nil/notObservable>
        a                skos:Concept ;
        rdfs:label       "Not observable"@en ;
        dct:description  "A system failure, sensor failure, or sensor obstruction, prevented the intended observation of the value."@en ;
        owl:versionInfo  <http://icao.int/iwxxm/2025-2> ;
        skos:notation    "notObservable" .

<http://codes.wmo.int/iwxxm/nil/template>
        a                skos:Concept ;
        rdfs:label       "Template"@en ;
        rdfs:seeAlso     <http://www.opengis.net/doc/gml#clause-8.2.3.1> ;
        dc:source        "ISO 19136:2007 Geographic information - Geography Markup Language sub-clause 8.2.3.1"@en ;
        dct:description  "The value will be available later."@en ;
        owl:versionInfo  <http://icao.int/iwxxm/2025-2> ;
        skos:notation    "template" .

<http://codes.wmo.int/iwxxm/nil/noSignificantChange>
        a                skos:Concept ;
        rdfs:label       "No significant change"@en ;
        dct:description  "No significant change is expected to occur."@en ;
        owl:versionInfo  <http://icao.int/iwxxm/2025-2> ;
        skos:altLabel    "NOSIG"@en ;
        skos:notation    "noSignificantChange" .

<http://codes.wmo.int/iwxxm/nil/withheld>
        a                skos:Concept ;
        rdfs:label       "Withheld"@en ;
        rdfs:seeAlso     <http://www.opengis.net/doc/gml#clause-8.2.3.1> ;
        dc:source        "ISO 19136:2007 Geographic information - Geography Markup Language sub-clause 8.2.3.1"@en ;
        dct:description  "The value is not divulged."@en ;
        owl:versionInfo  <http://icao.int/iwxxm/2025-2> ;
        skos:notation    "withheld" .

<http://codes.wmo.int/iwxxm/nil/notDetectedByAutoSystem>
        a                skos:Concept ;
        rdfs:label       "Nothing detected by automated system"@en ;
        dct:description  "The automated observing system did not detect a value (e.g. no cloud detected NCD)."@en ;
        owl:versionInfo  <http://icao.int/iwxxm/2025-2> ;
        skos:notation    "notDetectedByAutoSystem" .

<http://codes.wmo.int/iwxxm/nil/missing>
        a                skos:Concept ;
        rdfs:label       "Missing"@en ;
        rdfs:seeAlso     <http://www.opengis.net/doc/gml#clause-8.2.3.1> ;
        dc:source        "ISO 19136:2007 Geographic information - Geography Markup Language sub-clause 8.2.3.1"@en ;
        dct:description  "The correct value is not readily available to the sender of this data. Furthermore, a correct value may not exist."@en ;
        owl:versionInfo  <http://icao.int/iwxxm/2025-2> ;
        skos:notation    "missing" .

<http://codes.wmo.int/iwxxm/nil>
        a                reg:Register , ldp:Container ;
        rdfs:label       "Nil reasons" ;
        rdfs:member      <http://codes.wmo.int/iwxxm/nil/noSignificantChange> , <http://codes.wmo.int/iwxxm/nil/AboveDetectionRange> , <http://codes.wmo.int/iwxxm/nil/missing> , <http://codes.wmo.int/iwxxm/nil/notObservable> , <http://codes.wmo.int/iwxxm/nil/inapplicable> , <http://codes.wmo.int/iwxxm/nil/BelowDetectionRange> , <http://codes.wmo.int/iwxxm/nil/nothingOfOperationalSignificance> , <http://codes.wmo.int/iwxxm/nil/notDetectedByAutoSystem> , <http://codes.wmo.int/iwxxm/nil/template> , <http://codes.wmo.int/iwxxm/nil/withheld> , <http://codes.wmo.int/iwxxm/nil/unknown> ;
        dct:description  "Nil-reason terms are used to provide an explanation for recording a missing (or void) value within a data product. Terms are drawn from authorities in addition to WMO including ISO/TC 211 (from ISO 19136:2007 Geography markup language clause 8.2.3.1; published on their behalf by the Open Geospatial Consortium)." ;
        dct:modified     "2025-11-20T09:00:37.634Z"^^xsd:dateTime ;
        reg:notation     "nil" ;
        owl:versionInfo  14 .

<http://codes.wmo.int/iwxxm/nil/nothingOfOperationalSignificance>
        a                skos:Concept ;
        rdfs:label       "Nothing of operational signficance"@en ;
        dct:description  "Nothing was observed or forecast of operational significance (e.g. nil significant cloud NSC, nil significant weather NSW)."@en ;
        owl:versionInfo  <http://icao.int/iwxxm/2025-2> ;
        skos:notation    "nothingOfOperationalSignificance" .

<http://codes.wmo.int/iwxxm/nil/BelowDetectionRange>
        a                skos:Concept ;
        rdfs:label       "Below detection range"@en ;
        dct:description  "The value was below the detection range of the instrument used to estimate it."@en ;
        owl:versionInfo  <http://icao.int/iwxxm/2025-2> ;
        skos:notation    "BelowDetectionRange" .

<http://codes.wmo.int/iwxxm/nil/unknown>
        a                skos:Concept ;
        rdfs:label       "Unknown"@en ;
        rdfs:seeAlso     <http://www.opengis.net/doc/gml#clause-8.2.3.1> ;
        dc:source        "ISO 19136:2007 Geographic information - Geography Markup Language sub-clause 8.2.3.1"@en ;
        dct:description  "The correct value is not known to, and not computable by, the sender of this data. However, a correct value probably exists."@en ;
        owl:versionInfo  <http://icao.int/iwxxm/2025-2> ;
        skos:notation    "unknown" .