Through no fault of the Ohloh tool itself - it can only report on what it's told, after all - the reports that Ohloh generates should not be considered The Gospel.

He gives the example of the PHPSurveyor project (a lesser known project, at least to him) and ran the numbers. They came out with a surprising "731,822 lines of code, and would cost approximately $11 million dollars to reproduce".

Digging down a bit further, it looks like Ohloh is looking at the complete SVN repository for the project (both stable and development). Clay compares the two sides and finds only around 195,000 lines of code to Ohloh's findings of 731,822.

eZ components consists of 171,025 lines of code (including markup and code itself). If you subtract the XML, eZ components consist of 96,424 lines of pure PHP code (no docs included, if I got it correcltly), which is rather much in my eyes.

He gives other stats for the component framework including a price estimate for manhours put into the project and how much, on a per-developer basis, has been contributed to each (including things like a code to documentation ratio and total lines of code contributed).