Harker planes (property)

{
    "$id": "https://schemas.anyterial.se/defs/v0.1/properties/spacegroups/harker_planes",
    "$schema": "https://schemas.optimade.org/meta/v1.3/optimade/property_definition.json",
    "title": "Harker planes",
    "x-optimade-type": "list",
    "x-optimade-definition": {
        "kind": "property",
        "version": "0.1.0",
        "format": "1.3",
        "name": "harker_planes",
        "label": "harker_planes_spacegroups"
    },
    "x-optimade-unit": "inapplicable",
    "type": [
        "array",
        "null"
    ],
    "description": "Harker planes of the space group in fractional Patterson coordinates.\n\nEach entry describes one plane or special-position condition with an expression and optional exact normal, point, and constant data.",
    "items": {
        "x-optimade-type": "dictionary",
        "x-optimade-unit": "inapplicable",
        "type": [
            "object",
            "null"
        ],
        "description": "One Harker plane or special-position condition.",
        "properties": {
            "algebraic": {
                "x-optimade-type": "string",
                "x-optimade-unit": "inapplicable",
                "type": [
                    "string",
                    "null"
                ],
                "description": "Algebraic expression for the condition when emitted by cctbx."
            },
            "xyz": {
                "x-optimade-type": "string",
                "x-optimade-unit": "inapplicable",
                "type": [
                    "string",
                    "null"
                ],
                "description": "Plane equation in `x,y,z` notation when available."
            },
            "normal": {
                "x-optimade-type": "list",
                "x-optimade-unit": "inapplicable",
                "x-optimade-dimensions": {
                    "names": [
                        "dim_lattice"
                    ],
                    "sizes": [
                        3
                    ]
                },
                "type": [
                    "array",
                    "null"
                ],
                "description": "Integer normal vector of the plane.",
                "items": {
                    "x-optimade-type": "integer",
                    "x-optimade-unit": "inapplicable",
                    "type": [
                        "integer"
                    ],
                    "description": "One integer component of the normal vector."
                }
            },
            "point": {
                "x-optimade-type": "list",
                "x-optimade-unit": "inapplicable",
                "x-optimade-dimensions": {
                    "names": [
                        "dim_lattice"
                    ],
                    "sizes": [
                        3
                    ]
                },
                "type": [
                    "array",
                    "null"
                ],
                "description": "Point on the plane.",
                "items": {
                    "$id": "https://schemas.anyterial.se/defs/v0.1/properties/core/fraction",
                    "title": "Fraction",
                    "x-optimade-type": "string",
                    "x-optimade-definition": {
                        "label": "fraction_core",
                        "kind": "property",
                        "version": "0.1.0",
                        "format": "1.3",
                        "name": "fraction"
                    },
                    "type": [
                        "string",
                        "null"
                    ],
                    "description": "A numerical representation formed as the quotient of two numbers represented as a string.",
                    "examples": [
                        "2/3",
                        "5/42",
                        "10",
                        "0"
                    ],
                    "x-optimade-unit": "inapplicable"
                }
            },
            "const": {
                "$id": "https://schemas.anyterial.se/defs/v0.1/properties/core/fraction",
                "title": "Fraction",
                "x-optimade-type": "string",
                "x-optimade-definition": {
                    "label": "fraction_core",
                    "kind": "property",
                    "version": "0.1.0",
                    "format": "1.3",
                    "name": "fraction"
                },
                "type": [
                    "string",
                    "null"
                ],
                "description": "A numerical representation formed as the quotient of two numbers represented as a string.",
                "examples": [
                    "2/3",
                    "5/42",
                    "10",
                    "0"
                ],
                "x-optimade-unit": "inapplicable"
            }
        }
    },
    "examples": [
        [
            {
                "algebraic": "2*x,0,2*z",
                "normal": [
                    0,
                    1,
                    0
                ],
                "point": [
                    "0",
                    "0",
                    "0"
                ]
            }
        ]
    ]
}