From my opinion, this might be a typo error. The actual version name should be 8.0.0.L2 instead of 8.0.0.L1. If you unzip the file downloaded, you will also find 8.0.0.L2 in description files such as dsdkj8.0.0.L2.devkit.rrg_exp.txt or README.

Back to the real-time APIs related name convention, it will be in the following format:

<product_name>.<major_version>.<minor_version>.<micro_version>.<extras>

As far as I know, the extras can be:

• L is used to indicate a base maintenance release.
• E (stands for Emergency, sometimes referred as e-load) is used to indicate a software fixed release.

Some of the E-release contain partial libraries such as SFC API, Open DACS families, so you have to download corresponding L and the latest E versions (for example, rfaj8.0.0.E2 is a patch for rfaj8.0.0.L1/8.0.0.L2 and rfaj8.0.1.E3 is a patch for rfaj8.0.1.L1). Then, you need to integrate the based L libraries with the patch E libraries.

Anyway, if you are going to download the Open DACS library, I also recommend you download the recent version of Open DACS library 8.1.0.L1 as mentioned by @nleogas.

I suggest you download the latest RFA library (v. 8.1.0.L1) here. That contains the latest OpenDACS API.

Thanks @Nipat.