{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "$id": "https://schema.humancellatlas.org/module/biomaterial/5.1.1/preservation_storage",
  "description": "Information relating to how a biomaterial was preserved and/or stored over a period of time.",
  "additionalProperties": false,
  "title": "preservation_storage",
  "type": "object",
  "properties": {
    "describedBy": {
      "description": "The URL reference to the schema.",
      "type": "string",
      "pattern": "https://schema.humancellatlas.org/module/biomaterial/[0-9]{1,}.[0-9]{1,}.[0-9]{1,}/preservation_storage"
    },
    "schema_version": {
      "description": "The version number of the schema in major.minor.patch format.",
      "type": "string",
      "pattern": "^[0-9]{1,}.[0-9]{1,}.[0-9]{1,}$",
      "example": "4.6.1"
    },
    "storage_method": {
      "description": "The method by which a biomaterial was stored.",
      "type": "string",
      "enum": [
        "ambient temperature",
        "cut slide",
        "fresh",
        "frozen, -70C freezer",
        "frozen, -150C freezer",
        "frozen, liquid nitrogen",
        "frozen, vapor phase",
        "paraffin block",
        "RNAlater, frozen",
        "TRIzol, frozen"
      ],
      "comment": "Refers to how a biomaterial was stored after preservation or before another protocol was used.",
      "user_friendly": "Storage method"
    },
    "storage_time": {
      "description": "Length of time the biomaterial was stored for in Storage time units.",
      "type": "number",
      "example": 5,
      "user_friendly": "Storage time"
    },
    "storage_time_unit": {
      "description": "The unit in which Storage time is expressed.",
      "type": "object",
      "$ref": "https://schema.humancellatlas.org/module/ontology/5.1.1/time_unit_ontology",
      "example": "days",
      "user_friendly": "Storage time unit"
    },
    "preservation_method": {
      "description": "The method by which a biomaterial was preserved or not.",
      "type": "string",
      "enum": [
        "cryopreservation in liquid nitrogen (dead tissue)",
        "cryopreservation in dry ice (dead tissue)",
        "cryopreservation of live cells in liquid nitrogen",
        "cryopreservation, other",
        "formalin fixed, unbuffered",
        "formalin fixed, buffered",
        "formalin fixed and paraffin embedded",
        "Fresh"
      ],
      "comment": "Refers to the use of chemicals, cold, or other means to prevent or retard biological or physical deterioration of a biomaterial.",
      "user_friendly": "Storage method"
    }
  }
}