{
    "Level 1 Examples": {
        "level": 1,
        "variables": {
            "var": "value",
            "hello": "Hello World!"
        },
        "testcases": [
            ["{var}", "value"],
            ["'{var}'", "'value'"],
            ["{hello}", "Hello%20World%21"]
        ]
    },
    "Level 2 Examples": {
        "level": 2,
        "variables": {
            "var": "value",
            "hello": "Hello World!",
            "path": "/foo/bar"
        },
        "testcases": [
            ["{+var}", "value"],
            ["{+hello}", "Hello%20World!"],
            ["{+path}/here", "/foo/bar/here"],
            ["here?ref={+path}", "here?ref=/foo/bar"]
        ]
    },
    "Level 3 Examples": {
        "level": 3,
        "variables": {
            "var": "value",
            "hello": "Hello World!",
            "empty": "",
            "path": "/foo/bar",
            "x": "1024",
            "y": "768"
        },
        "testcases": [
            ["map?{x,y}", "map?1024,768"],
            ["{x,hello,y}", "1024,Hello%20World%21,768"],
            ["{+x,hello,y}", "1024,Hello%20World!,768"],
            ["{+path,x}/here", "/foo/bar,1024/here"],
            ["{#x,hello,y}", "#1024,Hello%20World!,768"],
            ["{#path,x}/here", "#/foo/bar,1024/here"],
            ["X{.var}", "X.value"],
            ["X{.x,y}", "X.1024.768"],
            ["{/var}", "/value"],
            ["{/var,x}/here", "/value/1024/here"],
            ["{;x,y}", ";x=1024;y=768"],
            ["{;x,y,empty}", ";x=1024;y=768;empty"],
            ["{?x,y}", "?x=1024&y=768"],
            ["{?x,y,empty}", "?x=1024&y=768&empty="],
            ["?fixed=yes{&x}", "?fixed=yes&x=1024"],
            ["{&x,y,empty}", "&x=1024&y=768&empty="]
        ]
    },
    "Level 4 Examples": {
        "level": 4,
        "variables": {
            "var": "value",
            "hello": "Hello World!",
            "path": "/foo/bar",
            "list": ["red", "green", "blue"],
            "keys": { "semi": ";", "dot": ".", "comma": "," }
        },
        "testcases": [
            ["{var:3}", "val"],
            ["{var:30}", "value"],
            ["{list}", "red,green,blue"],
            ["{list*}", "red,green,blue"],
            ["{keys}", [
                    "comma,%2C,dot,.,semi,%3B",
                    "comma,%2C,semi,%3B,dot,.",
                    "dot,.,comma,%2C,semi,%3B",
                    "dot,.,semi,%3B,comma,%2C",
                    "semi,%3B,comma,%2C,dot,.",
                    "semi,%3B,dot,.,comma,%2C"
                ]],
            ["{keys*}", [
                    "comma=%2C,dot=.,semi=%3B",
                    "comma=%2C,semi=%3B,dot=.",
                    "dot=.,comma=%2C,semi=%3B",
                    "dot=.,semi=%3B,comma=%2C",
                    "semi=%3B,comma=%2C,dot=.",
                    "semi=%3B,dot=.,comma=%2C"
                ]],
            ["{+path:6}/here", "/foo/b/here"],
            ["{+list}", "red,green,blue"],
            ["{+list*}", "red,green,blue"],
            ["{+keys}", [
                    "comma,,,dot,.,semi,;",
                    "comma,,,semi,;,dot,.",
                    "dot,.,comma,,,semi,;",
                    "dot,.,semi,;,comma,,",
                    "semi,;,comma,,,dot,.",
                    "semi,;,dot,.,comma,,"
                ]],
            ["{+keys*}", [
                    "comma=,,dot=.,semi=;",
                    "comma=,,semi=;,dot=.",
                    "dot=.,comma=,,semi=;",
                    "dot=.,semi=;,comma=,",
                    "semi=;,comma=,,dot=.",
                    "semi=;,dot=.,comma=,"
                ]],
            ["{#path:6}/here", "#/foo/b/here"],
            ["{#list}", "#red,green,blue"],
            ["{#list*}", "#red,green,blue"],
            ["{#keys}", [
                    "#comma,,,dot,.,semi,;",
                    "#comma,,,semi,;,dot,.",
                    "#dot,.,comma,,,semi,;",
                    "#dot,.,semi,;,comma,,",
                    "#semi,;,comma,,,dot,.",
                    "#semi,;,dot,.,comma,,"
                ]],
            ["{#keys*}", [
                    "#comma=,,dot=.,semi=;",
                    "#comma=,,semi=;,dot=.",
                    "#dot=.,comma=,,semi=;",
                    "#dot=.,semi=;,comma=,",
                    "#semi=;,comma=,,dot=.",
                    "#semi=;,dot=.,comma=,"
                ]],
            ["X{.var:3}", "X.val"],
            ["X{.list}", "X.red,green,blue"],
            ["X{.list*}", "X.red.green.blue"],
            ["X{.keys}", [
                    "X.comma,%2C,dot,.,semi,%3B",
                    "X.comma,%2C,semi,%3B,dot,.",
                    "X.dot,.,comma,%2C,semi,%3B",
                    "X.dot,.,semi,%3B,comma,%2C",
                    "X.semi,%3B,comma,%2C,dot,.",
                    "X.semi,%3B,dot,.,comma,%2C"
                ]],
            ["{/var:1,var}", "/v/value"],
            ["{/list}", "/red,green,blue"],
            ["{/list*}", "/red/green/blue"],
            ["{/list*,path:4}", "/red/green/blue/%2Ffoo"],
            ["{/keys}", [
                    "/comma,%2C,dot,.,semi,%3B",
                    "/comma,%2C,semi,%3B,dot,.",
                    "/dot,.,comma,%2C,semi,%3B",
                    "/dot,.,semi,%3B,comma,%2C",
                    "/semi,%3B,comma,%2C,dot,.",
                    "/semi,%3B,dot,.,comma,%2C"
                ]],
            ["{/keys*}", [
                    "/comma=%2C/dot=./semi=%3B",
                    "/comma=%2C/semi=%3B/dot=.",
                    "/dot=./comma=%2C/semi=%3B",
                    "/dot=./semi=%3B/comma=%2C",
                    "/semi=%3B/comma=%2C/dot=.",
                    "/semi=%3B/dot=./comma=%2C"
                ]],
            ["{;hello:5}", ";hello=Hello"],
            ["{;list}", ";list=red,green,blue"],
            ["{;list*}", ";list=red;list=green;list=blue"],
            ["{;keys}", [
                    ";keys=comma,%2C,dot,.,semi,%3B",
                    ";keys=comma,%2C,semi,%3B,dot,.",
                    ";keys=dot,.,comma,%2C,semi,%3B",
                    ";keys=dot,.,semi,%3B,comma,%2C",
                    ";keys=semi,%3B,comma,%2C,dot,.",
                    ";keys=semi,%3B,dot,.,comma,%2C"
                ]],
            ["{;keys*}", [
                    ";comma=%2C;dot=.;semi=%3B",
                    ";comma=%2C;semi=%3B;dot=.",
                    ";dot=.;comma=%2C;semi=%3B",
                    ";dot=.;semi=%3B;comma=%2C",
                    ";semi=%3B;comma=%2C;dot=.",
                    ";semi=%3B;dot=.;comma=%2C"
                ]],
            ["{?var:3}", "?var=val"],
            ["{?list}", "?list=red,green,blue"],
            ["{?list*}", "?list=red&list=green&list=blue"],
            ["{?keys}", [
                    "?keys=comma,%2C,dot,.,semi,%3B",
                    "?keys=comma,%2C,semi,%3B,dot,.",
                    "?keys=dot,.,comma,%2C,semi,%3B",
                    "?keys=dot,.,semi,%3B,comma,%2C",
                    "?keys=semi,%3B,comma,%2C,dot,.",
                    "?keys=semi,%3B,dot,.,comma,%2C"
                ]],
            ["{?keys*}", [
                    "?comma=%2C&dot=.&semi=%3B",
                    "?comma=%2C&semi=%3B&dot=.",
                    "?dot=.&comma=%2C&semi=%3B",
                    "?dot=.&semi=%3B&comma=%2C",
                    "?semi=%3B&comma=%2C&dot=.",
                    "?semi=%3B&dot=.&comma=%2C"
                ]],
            ["{&var:3}", "&var=val"],
            ["{&list}", "&list=red,green,blue"],
            ["{&list*}", "&list=red&list=green&list=blue"],
            ["{&keys}", [
                    "&keys=comma,%2C,dot,.,semi,%3B",
                    "&keys=comma,%2C,semi,%3B,dot,.",
                    "&keys=dot,.,comma,%2C,semi,%3B",
                    "&keys=dot,.,semi,%3B,comma,%2C",
                    "&keys=semi,%3B,comma,%2C,dot,.",
                    "&keys=semi,%3B,dot,.,comma,%2C"
                ]],
            ["{&keys*}", [
                    "&comma=%2C&dot=.&semi=%3B",
                    "&comma=%2C&semi=%3B&dot=.",
                    "&dot=.&comma=%2C&semi=%3B",
                    "&dot=.&semi=%3B&comma=%2C",
                    "&semi=%3B&comma=%2C&dot=.",
                    "&semi=%3B&dot=.&comma=%2C"
                ]]
        ]
    }
}