In section 'Extension Option' (3.3.8 in public draft, 3.4.8 in internal draft), the second example has three syntax errors.

//para[. ftcontains "Kinder" ftand "Platz" 
        distance 1 words with stemming option exq:compounds "distance=1"

[1]
"distance 1 words" should be "distance exactly 1 words"

[2]
The FTSTemOption and FTExtensionOption are positioned as if they were FTPosFilters (because they follow an FTDistance), which is not correct. Instead, they must appear as FTMatchOptions applied to an FTPrimary (which in this case has to be a parenthesized FTSelection).

[3]
The closing ']' is missing.

So the example should be:

//para[. ftcontains
        ("Kinder" ftand "Platz" distance exactly 1 words)
        with stemming
        option exq:compounds "distance=1"]

or

//para[. ftcontains
        ("Kinder" ftand "Platz")
        with stemming
        option exq:compounds "distance=1"
        distance exactly 1 words]