040000 tree 5f188c7311743909bd6a25b20b709d2695f3a36c	browsers
040000 tree 4680e76deb1c00da4686d296920b490c8c78187b	dom
040000 tree 94248a3712341ed2703a5665047ca6f206257a8e	semantics
040000 tree 58c0d6411c4681f552300d3d9bca06a5fa3b5cfd	syntax