node1 {
    tag_node foo {
        valueless
        multi_node 'v2'
        multi_node 'v1'
        single 'left_val'
    }
    tag_node bar {
        node {
            single 'v0'
        }
    }
    tag_node other {
        leaf 'leaf_l'
    }
}

node3 {
}

node2 {
    sub_node_other {
        single 'val'
    }
    sub_node {
        tag_node other {
            single 'val'
        }
        tag_node bob {
            valued 'baz'
        }
        tag_node duff {
            valued 'buz'
        }
    }
}