Dear Christian,
The syntax of the ft:search is -
*ft:search($db as xs:string, $terms as item()*, $options as item()) as text()**
In the $options part, I have seen various options like - Any Word, All Words, Phrase (for Exact Phrase), fuzzy and wildcards.
These are really very good features. I am using them extensively.
But one thing, I think, is missing and that is the Window/Distance Options for proximity search.
Can these options be implemented.. ??