vscode-xml/languages/xquery/xquery.json

{
    "comments": {
        "lineComment": ["(:", ":)"],
        "blockComment": [ "(:~", "~:)"]
    },
    "brackets": [
        [
            "{",
            "}"
        ],
        [
            "[",
            "]"
        ],
        [
            "(",
            ")"
        ]
    ]
}