This is the presentation of the talk I gave at the Play! Framework meetup we had on August 27th 2013.
It deals with the two most common kinds a serialization a web app has to deal with: To and From JSON
– to talk to a browser or other web service – on one hand, and
to and from a relational database on the other.
You can also find a video of the presentation (including another talk before this one) here: http://www.ustream.tv/recorded/37901943.