In an effort to encourage broader use of its Open Graph protocol, Facebook has posted a number of examples of
how the company used the Web standard to build its own internal apps.
The collection, described by Facebook developer Paul Tarjan in a
blog post, displays a wide range of ways that the Open Graph could be used, such as in code review, fitness
tracking and image sharing.
The tools were created as a way to test the company’s Open Graph protocol internally before it was released for
others to use, Tarjan explained. Some of the apps, a small subset of all the internally developed apps, were built
during the company’s hackathons, where developers could spend time
building their pet projects, according to the company.
“One of the cool things about building on our own platform is that we’ve been able to catch bugs and figure out
pain points for developers,” Tarjan wrote. “We learned that it’s really important to think hard about how you want
to model your objects and actions at the beginning.”
Although Facebook has not released any of these apps, Tarjan described how they work in the blog post, and
discussed some of the decisions that drove their design.
One tool connects code review software used by Facebook engineers, called Phabricator, to the Facebook timeline, allowing project participants to share
information on code changes. It also provides an easy way to summarize how many lines of code were committed by
each developer and to pinpoint the biggest change each developer committed to the project.
Another app, called Pixelcloud, allows Facebook developers to share mock-ups, screenshots and other graphical
files, and keep track of which users reviewed a particular item.
Not all apps are work-related: One creation, called StayFit, logs into Facebook each time the user checks into
the Facebook employee fitness center. Thus far, 322 Facebook employees have installed the app and 249 people use it
on a monthly basis. Facebook developers are now looking for ways for the app to draw user workout data directly
from elliptical machines and treadmills.
The post also described apps for recognizing spam, aggregating data in memory so it can be analyzed, and for
spawning a Pokemon animation that flies across a page each time the user finishes a task.
While divergent in the tasks they execute, each of these apps adheres to a similar design pattern. The
developers described their data model in the Open Graph syntax and connected with Facebook
through an API (application programming interface).
Launched in 2010, Facebook’s Open Graph provides a protocol for third-party
applications to publish information to the Facebook platform through a set of RDFa (Resource Description Framework
in attributes) tags. RDFa has been cited as an instrumental technology for enabling
the semantic Web, an effort to
structure Web pages so that their information could be directly consumed by Internet services.
Using Open Graph, a third-party application can provide user data to Facebook, so it can be automatically
rendered on the user’s timeline.
Joab Jackson covers enterprise software and general technology breaking news for The IDG News
Service. Follow Joab on Twitter at @Joab_Jackson.
Joab’s e-mail address is Joab_Jackson@idg.com