User guide issue : disappeared or deprecated field?

I tried to use cwl and followed the [Common Workflow Language User Guide](http://www.commonwl.org/user_guide/),but I had questions.

[In section 4(Returning Output Files)](http://www.commonwl.org/user_guide/04-output/index.html), `"example_out"` field is written as follows:
~~~
"example_out": {
"checksum": "sha1$da39a3ee5e6b4b0d3255bfef95601890afd80709",
"basename": "hello.txt",
"nameroot": "hello",
"nameext": ".txt",
"location": "file:///home/me/cwl/user_guide/hello.txt",
"path": "/home/me/cwl/user_guide/hello.txt",
"class": "File",
"size": 0
}
~~~

However, "nameroot" and "nameext" have disappeared in my results. Is this caused by version of my cwl?

Here is my cwl verison

~~~
$cwltool --version
~/.pyenv/versions/3.6.1/bin/cwltool 1.0.20190621234233
~~~

It seems that same problem is existing in Section 5 and Section 6.

Thanks.