Abstract: In one embodiment, a method includes accessing one or more graphs stored in one or more data stores, each graph comprising one or more nodes arranged in a hierarchical format, each node representing one or more data items, each data item having a particular one of a plurality of data types; generating a first query requesting a data structures of a specific data type; retrieving the data structure of the specific data type from the graphs; generating a second query requesting one or more specific data items having the specific data type, the second query being expressed in a format corresponding to the retrieved data structure of the specific data type; and retrieving the specific data items from the graphs.

Abstract: Techniques to allow optimized scrolling of information from a social networking system. In one embodiment, bi-directional display of references, such as content, is provided on a computer system, such as a mobile device. References are presented in a first orientation in a scrollable stream. In response to an interaction by a user, presentation of the scrollable stream is transformed from the first orientation to a second orientation. The first orientation may be substantially parallel with a length of an interface of the computer system. The first orientation and the second orientation may be orthogonal. Components of the references are omitted from presentation when the scrollable stream is presented in the first orientation. At least one of the omitted components of the references is included for presentation when the scrollable stream is presented in the second orientation.