Further information on the HIV_INTERACTION lists?

Greetings

I'm an HIV researcher and would like to use the HIV_INTERACTION and HIV_INTERACTION_CATEGORY annotations, but I have a couple questions:

1. Is there any information out there on when these lists were most recently updated, and which studies the information comes from?

2. Also, is there an explanation of what the "categories" are in HIV_INTERACTION_CATEGORY?  For HIV_INTERACTION, it looks like a list of genes and which HIV proteins each gene interacts with (an individual gene may be listed twice).  For HIV_INTERACTION_CATEGORY, it lists the HIV protein and how it interacts -- whether it binds, inhibits, upregulates, downregulates, incorporates, etc.  Are there guidelines for how this additional information might be used or is commonly used?

Thanks,

Another David