Thank you for your comments on property path syntax. As already mentioned, the syntax for IRIs is discussed in section 4.1.1.
I have added a link for the text in section 9.1 "Property Path Syntax" at "an IRI written in full or abbreviated by a prefixed name".
Also, the first example has been given an alternative writing:
I would be grateful if you reply to this message to confirm that the working group has responded to your comment.
Yours, on behalf of the SPARQL Working Group,