{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "description": "The period of time in which a day is commonly divided.",
    "type": "string",
    "references": [
        {
            "value": "morning",
            "description": "The SNOMED code represents morning (temporal qualifier)",
            "url": "http://purl.bioontology.org/ontology/SNOMEDCT/73775008"
        },
        {
            "value": "afternoon",
            "description": "The SNOMED code represents afternoon (temporal qualifier)",
            "url": "http://purl.bioontology.org/ontology/SNOMEDCT/422133006"
        },
        {
            "value": "evening",
            "description": "The SNOMED code represents evening (temporal qualifier)",
            "url": "http://purl.bioontology.org/ontology/SNOMEDCT/3157002"
        },
        {
            "value": "night",
            "description": "The SNOMED code represents night time (temporal qualifier)",
            "url": "http://purl.bioontology.org/ontology/SNOMEDCT/2546009"
        }
    ],
    "enum": [
        "morning",
        "afternoon",
        "evening",
        "night"
    ]
}