Programming Erlang, 2nd Edition

Include Files

Files can be included with the following syntax:

In Erlang, the convention is that include files have the extension hrl. The FileName should contain an absolute or relative path so that the preprocessor can locate the appropriate file. Library header files can be included with the following syntax:

Here’s an example:

In this case, the Erlang compiler will find the appropriate include files. (kernel, in the previous example, refers to the application that defines this header file.)

Include files usually contain record definitions. If many modules need to share common record definitions, then the common record definitions are put into include ...