plugInfo.json

{
    "Plugins": [
        {
            "Info": {
                "SdfMetadata": {
                    "Usd_Triangle_SideLength": {
                        "type": "double",
                        "displayGroup": "Core",
                        "appliesTo": ["prims"],
                        "documentation:": "Length of the triangle side."
                    }
                },
                "Types": {
                    "UsdTriangleFileFormat": {
                        "bases": [
                            "SdfFileFormat"
                        ],
                        "displayName": "USD Triangle File Format",
                        "extensions": [
                            "triangle"
                        ],
                        "formatId": "usdTriangleFileFormat",
                        "primary": true,
                        "target": "usd"
                    }
                }
            },
            "LibraryPath": "@PLUG_INFO_LIBRARY_PATH@", 
            "Name": "usdTriFileFormat",
            "ResourcePath": "@PLUG_INFO_RESOURCE_PATH@", 
            "Root": "@PLUG_INFO_ROOT@", 
            "Type": "library"
        }
    ]
}