search engine arg:value [arg:value ...] keyword

{
    // when perform and auick search command, if there isn't source specified already, use the following search engine by default
    "default_search_engine": "https://www.google.com/search?q=",

    // when perform an quick launch command, if there isn't source specified already, use the following site by default
    "default_site": "http://devdocs.io/#q=",

    /**
     * Define the urls that used by quick launch and quick search
     *
     * doc_url is used by quick launch
     * search_url is used by quick search
     * ---------------------------------------------------------------------------
     */

    "python": {
        "doc_url": "https://docs.pythonlang.cn/3.4/library/",
        "search_url": "https://docs.pythonlang.cn/3.4/search.html?check_keywords=yes&area=default&q=",
    },

    /**
     * Define the search pattern for quick panel search
     *
     * The format of the source pattern can be defined as:
     *  "prefix": {
     *      "pattern": "http://xxxxx/${keyname:defaultValue}/xxxx?q="
     *  }
     *
     *  Then when you type in the input panel (ctrl + shift + ; by default) with
     *      prefix keyname:val querystring
     *  It will launch a search at http://xxxxx/var/xxxx?q=querystring
     *  ---------------------------------------------------------------------------
     */

    "search_patterns": {
        "g": {
            "pattern": "https://www.google.com/search?hl=${l:en}&q="
        },
        "mdn": {
            "pattern": "https://mdn.org.cn/${l:en-US}/search?topic=${t:}&q="
        },
        ...
    }
}