Standard full Hermann-Mauguin symbol (property)

{
    "$id": "https://schemas.anyterial.se/defs/v0.1/properties/spacegroups/hm_full_std",
    "$schema": "https://schemas.optimade.org/meta/v1.3/optimade/property_definition.json",
    "title": "Standard full Hermann-Mauguin symbol",
    "x-optimade-type": "string",
    "x-optimade-definition": {
        "kind": "property",
        "version": "0.1.0",
        "format": "1.3",
        "name": "hm_full_std",
        "label": "hm_full_std_spacegroups"
    },
    "type": [
        "string",
        "null"
    ],
    "description": "The International Tables standard full Hermann-Mauguin symbol for the space-group type.\n\nHermann-Mauguin symbols describe crystallographic space groups using lattice-centering symbols and symmetry-element symbols. The setting-specific fields describe the concrete Hall/International Tables setting of the current record. The `*_std` fields describe the IT-standard setting for the space-group type and can therefore be identical across multiple settings with the same IT number.\n\n**Requirements/Conventions**:\n\n- The plain string form uses spaces between symbol parts where this is needed for unambiguous parsing.\n- Older-symbol fields are present only where an older International Tables form is retained for comparison or aliasing.",
    "x-optimade-unit": "inapplicable",
    "examples": [
        "P 1",
        "P -1"
    ]
}