Deprecated: Return type of YDataTable::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/bdavid/prod/georef/yamldoc/ydclasses/ydata.inc.php on line 428

Deprecated: Return type of YamlDataTable::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/bdavid/prod/georef/yamldoc/ydclasses/yamldata.inc.php on line 295
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{
    "inScheme": [
        100141,
        100261
    ],
    "topConceptOf": [
        100141,
        100261
    ],
    "prefLabel": {
        "en": "materials technology",
        "fr": "technologie des matériaux"
    },
    "narrower": [
        3800,
        3801,
        3640,
        6361,
        3803
    ],
    "notation": [
        4418
    ]
}