update faq

Author: yellowbean

docs/source/faq.rst

@@ -4,24 +4,55 @@ FAQ
 Why `absbox` is a wrapper while `Hastructure` as engine ?
 ------------------------------------------------------------
 
+It's just a huge burden to model structured products in a dynamic language like `Python` or `Clojure`.
+`Haskell` provides extream concise modelling language and high performance calculation engine.
 
 
+Information leakage on `Hastructure` ?
+---------------------------------------
+
+If you send out run request to `Hastructure`, user may raise question whether other privacy information was sent to the engine as well.
+Eventhough not many people can read the `Hastructure` code, but:
+
+* it's open-souce 
+* it has been verified by a big-name company
+
+
+Can I use my own engine ?
+-------------------------------------
+
+Yes, you can pull docker image and delpoy it in your own server.
+
+Or just use the pre-built binary and run it in your own server.
 
 
 Why using `list`/`tuple`/`dict` in `absbox` ?
 -----------------------------------------------
 
-it's a `Data-Driven` oriented design, it's easy to pull data from any database/local files with variant formats and build inputs for `absbox` easily.
+It's a `Data-Driven` oriented design, it's easy to pull data from any database/local files with variant formats and build inputs for `absbox` easily.
+
+Other packages like `pandas` or `numpy`, `lenses` works fairly well with native data types as well.
 
 
 Why there is no UI ?
 -----------------------
 
+UI is always a huge topic , because it's hard to satisfy everyone's need. `Risk Manger` `Quant` `Trader` `Structurer` all have different requirements on UI to satisfy their own specific needs.
+
+Even some magic happens there are 4 sets of UIs to be developed, the workflows accross differnet companies will create frictions as well.
+
+`absbox` and `Hastructure` would focus on core functionalities and provide `RESTful` service to make it easy to integrate with any UIs.
 
 
-Why `absbox` has commerial support ? 
+Why commerial support ? 
 ---------------------------------------
 
+The `absbox` and `Hastructure` will remains free and open-source, while adopting it and using it in production, user may need some commerial support for the benefits below:
+
+* quick knowledge transfer
+* short integration time
+
+