properties.json

{
    "languages": { "en": "English", "it": "Italian" },

    "pages": {
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        "index": { "leaf": true, "id": "index" },
        "subpages": [
            {
                "leaf": false,
                "index": { "leaf": true, "id": "introduction" },
                "subpages": [
                    { "leaf": true, "id": "what_is_gb" },
                    { "leaf": true, "id": "concepts" },
                    { "leaf": true, "id": "tools" }
                ]
            },
            {
                "leaf": false,
                "index": { "leaf": true, "id": "basics" },
                "subpages": [
                    { "leaf": true, "id": "syntax" },
                    { "leaf": true, "id": "registers" },
                    { "leaf": true, "id": "memory" },
                    { "leaf": true, "id": "flags" },
                    { "leaf": true, "id": "arithmetics" },
                    { "leaf": true, "id": "interlude" },
                    { "leaf": true, "id": "jumping" },
                    { "leaf": true, "id": "displaying" },
                    { "leaf": true, "id": "hello-world" }
                ]
            },
            {
                "leaf": false,
                "index": { "leaf": true, "id": "intermediate" },
                "subpages": [
                    { "leaf": true, "id": "memories" },
                    { "leaf": true, "id": "stack" },
                    { "leaf": true, "id": "calling" },
                    { "leaf": true, "id": "interrupts" },
                    { "leaf": true, "id": "unfinished" }
                ]
            },
            {
                "leaf": false,
                "index": { "leaf": true, "id": "extras" },
                "subpages": [
                    { "leaf": true, "id": "resources" },
                    {
                        "leaf": false,
                        "index": { "leaf": true, "id": "instructions" },
                        "subpages": [
                            { "leaf": true, "id": "data_manip" }
                        ]
                    }
                ]
            }
        ],
        "special_pages": [
            { "leaf": true, "id": "404" }
        ]
    },

    "stylesheets": [ "normalize", "common" ],
    "metas": {
        "og:description": "property",
        "description": "name",
        "keywords": "name"
    }
}