Material.json

{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "title": "Material",
    "description": "This form is for describing any measurable substance (e.g., sample, specimen, material, chemical, etc.), or a specific sup-sample (e.g., location on a larger artifact, sub-portion of a larger artifact, item within a collection of specimens, etc.).",
    "required": [
        "@id",
        "@context",
        "@type"
    ],
    "allOf": [
        {
            "@context": {
                "type": "array",
                "default": [
                    "http://schema.org/",
                    {
                        "mat": "https://pages.nist.gov/material-schema/",
                        "parameterControlled": "mat:parameterControlled",
                        "variableMeasured": "mat:variableMeasured",
                        "@vocab": "https://pages.nist.gov/material-schema/user-defined/"
                    }
                ]
            },
            "@type": {
                "type": "array",
                "default": [
                    "CreativeWork",
                    "mat:Material"
                ]
            }
        },
        {
            "$ref": "definition-schemas/CordraObjectID.json#/definitions/CordraObjectID"
        },
        {
            "$ref": "definition-schemas/Thing.json#/definitions/Thing"
        },
        {
            "$ref": "definition-schemas/CreativeWork.json#/definitions/CreativeWork"
        },
        {
            "$ref": "definition-schemas/Material.json#/definitions/Material"
        },
        {
            "$ref": "definition-schemas/Product.json#/definitions/Product"
        }
    ]
}