{
  "@context": {
    "schema": "http://schema.org/",
    "ex": "https://example.org/"
  },
  "@id": "ex:sampleMaterialTypes",
  "@type": [
    "schema:DefinedTermSet"
  ],
  "schema:name": "Sample Material Types",
  "schema:description": "A minimal controlled vocabulary of geological sample material classifications.",
  "schema:hasDefinedTerm": [
    {
      "@type": [
        "schema:DefinedTerm"
      ],
      "@id": "ex:rock",
      "schema:name": "Rock",
      "schema:termCode": "rock"
    },
    {
      "@type": [
        "schema:DefinedTerm"
      ],
      "@id": "ex:soil",
      "schema:name": "Soil",
      "schema:termCode": "soil"
    }
  ]
}