Understanding LuCi ( trying to figure out what is under its interface)

For Developers
1

Hello. I am currently trying to add my own menu item to my router and see through official wiki luci/applications/luci-app-example/README.md at openwrt-24.10 · openwrt/luci · GitHub

I installed luci-app-example and found all necessary files, like:

root@OpenWrt:~# find /usr -name "*luci-app-example*"
/usr/lib/opkg/info/luci-app-example.control
/usr/lib/opkg/info/luci-app-example.postinst
/usr/lib/opkg/info/luci-app-example.postinst-pkg
/usr/lib/opkg/info/luci-app-example.prerm
/usr/lib/opkg/info/luci-app-example.list
/usr/share/luci/menu.d/luci-app-example.json
/usr/share/rpcd/acl.d/luci-app-example.json

I open /usr/share/luci/menu.d/luci-app-example.json

{
  "admin/example/": {
    "title": "Example",
    "order": 60,
    "action": {
      "type": "firstchild"
    },
    "depends": {
      "acl": [ "luci-app-example" ]
    }
  },

  "admin/example/form": {
    "title": "Form View",
    "order": 1,
    "action": {
      "type": "view",
      "path": "example/form"
    }
  },

  "admin/example/html": {
    "title": "HTML Page",
    "order": 2,
    "action": {
      "type": "view",
      "path": "example/htmlview"
    }
  },

  "admin/example/rpc-array": {
    "title": "RPC Array Example",
    "order": 3,
    "action": {
      "type": "view",
      "path": "example/rpc"
    }
  },

  "admin/example/rpc-jsonmap-table": {
    "title": "RPC JSONMap Table Example",
    "order": 4,
    "action": {
      "type": "view",
      "path": "example/rpc-jsonmap-tablesection"
    }
  },

  "admin/example/rpc-jsonmap-typed": {
    "title": "RPC JSONMap Typed Example",
    "order": 5,
    "action": {
      "type": "view",
      "path": "example/rpc-jsonmap-typedsection"
    }
  }
}

but to not understand some lines. For example what means line

"order": 60

It is some code number? Where I can see through all code numbers?

Also I would be appreciated if you explain to me all other lines may be. For I understand some obvious like

"title": "Example",

but I do not have clear understanding of

"admin/example/"

for example.

Thank you.