Where does Google find API documentation? (Appendix)

The documentation of popular APIs is spread across many formats, from vendor-curated reference documentation to Stack Overflow threads. For developers, it is often not obvious from where a particular piece of information can be retrieved. To understand this documentation landscape, we systematically conducted Google searches for the elements of ten popular APIs.

The appendix contains a README file that explains its structure.

We encourage other researchers to use this data to study API documentation returned by Google searches.