I have been using SCORM for some time. I wonder what "ADL Data From LMS" is used for. I cannot find many references about it online. Can I use it for receiving and storing aditional data in the LMS?
That element is a rarely used SCORM 1.2 element. It appears in the Content Aggregation Model specification document attached in section 22.214.171.124.1.2.7.
It is a leftover piece from SCORM 1.1 that they actually tell you that you should use with caution...the description says that it is a place for initialization data expected by the resource represented by the item after launch.