{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "$id": "https://schema.humancellatlas.org/core/protocol/5.2.1/protocol_core",
  "description": "A protocol entity contains information about an intended protocol that was followed in the project.",
  "additionalProperties": false,
  "required": [
    "protocol_id"
  ],
  "title": "protocol_core",
  "type": "object",
  "properties": {
    "describedBy": {
      "description": "The URL reference to the schema.",
      "type": "string",
      "pattern": "^(http|https)://schema.(.*?)humancellatlas.org/core/protocol/(([0-9]{1,}.[0-9]{1,}.[0-9]{1,})|([a-zA-Z]*?))/protocol_core"
    },
    "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,}$",
      "example": "4.6.1"
    },
    "protocol_id": {
      "description": "A unique ID for this protocol.",
      "type": "string",
      "user_friendly": "Protocol ID"
    },
    "protocol_name": {
      "description": "A short, descriptive name for the protocol that need not be unique.",
      "type": "string",
      "user_friendly": "Protocol name"
    },
    "protocol_description": {
      "description": "A general description of the protocol.",
      "type": "string",
      "user_friendly": "Protocol description"
    },
    "publication_doi": {
      "description": "The publication digital object identifier (doi) associated with the protocol.",
      "type": "string",
      "example": "10.1101/193219",
      "user_friendly": "Publication DOI"
    },
    "protocols_io_doi": {
      "description": "The protocols.io digital object identifier (doi) associated with the protocol.",
      "type": "string",
      "example": "10.17504/protocols.io.mgjc3un",
      "user_friendly": "protocols.io DOI"
    },
    "document": {
      "description": "A filename of a PDF document containing the details of the protocol.",
      "type": "string",
      "pattern": "^.*.pdf$",
      "user_friendly": "Document filename"
    }
  }
}