.LRN supports several educational standards in the following packages:
LORS: expands .LRN to incorporate IMS Metadata (IMS-MD 1.2.1) and IMS Content Packaging (IMS-CP 1.1.4) specifications as well as ADL SCORM extensions (SCORM 1.2).
Assessment: import IMS-QTI 1.2.1 zip files to create an assessment or export an assessment into IMS-QTI 1.2.1.
IMS-LD: plays IMS-LD units of learning (UoLs), and is integrated with ADL SCORM, IMS QTI and the .LRN forums. Information about the last stable release can be read in this link. The release was announced here.
IMS Enterprise: handle any IMS Enterprise v.1.1 XML document and reflect all the respective data into .LRN.