{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "description": "Information about the project.",
    "additionalProperties": false,
    "required": [
        "project_short_name",
        "project_title",
        "project_description"
    ],
    "title": "Project core",
    "name": "project_core",
    "type": "object",
    "properties": {
        "describedBy": {
            "description": "The URL reference to the schema.",
            "type": "string",
            "pattern" : "^(http|https)://schema.(.*?)humancellatlas.org/core/project/(([0-9]{1,}.[0-9]{1,}.[0-9]{1,})|([a-zA-Z]*?))/project_core"
        },
        "schema_version": {
            "description": "The version number of the schema in major.minor.patch format.",
            "type": "string",
            "pattern": "^[0-9]{1,}.[0-9]{1,}.[0-9]{1,}$",
            "example": "4.6.1"
        },
        "project_short_name": {
            "description": "A short name for the project.",
            "type": "string",
            "example": "CoolOrganProject.",
            "user_friendly": "Project label",
            "guidelines": "Project label is a short label by which you refer to the project. It should have no spaces and should be fewer than 50 characters."
        },
        "project_title": {
            "description": "An official title for the project.",
            "type": "string",
            "example": "Study of single cells in the human body.",
            "user_friendly": "Project title",
            "guidelines": "Project title should be fewer than 30 words, such as a title of a grant proposal or a publication."
        },
        "project_description": {
            "description": "A longer description of the project which includes research goals and experimental approach.",
            "type": "string",
            "user_friendly": "Project description",
            "guidelines": "Project description should be fewer than 300 words, such as an abstract from a grant application or publication."
        }
    }
}