Learning Portal for SAP LSO

Hi,

We are implementing SAP Learning Solutions in our org.

According to the information i read in the forum, apart from the R/3, Learning Portal is used on EP.

My understanding is :

The Learnign Portal is the entry point for Learners in SAP LSO. And one has to call the BSP application "HCM_LEARNING" from EP through a BSP iView and it will call the Learning Portal of LSO.

This learnig portal has features like,

Searching the course catalog, Book/cancel course participation etc.

is my understanding correct ?

I also want to know Is there any Web Dynpro for ABAP component also involved in Learning Portal or the BSP application HCM_LEARNING itself takes care of all the functionalities.

Please help.