# diff¶

The diff command is used for executing a simple contextual difference between two sources.

\$ pdal diff <source> <candidate>

--source arg     Non-positional option for specifying filename of source file.
--candidate arg  Non-positional option for specifying filename to test against source.


The command returns 0 and produces no output if the files describe the same point data in the same format, otherwise 1 is returned and a JSON-formatted description of the differences is produced.

The command checks for the equivalence of the following items:

• Different schema
• Expected count