Only IEEE is an official standardization organisation, the two others,
ADL and IMS are - like Bill Gates - marketleaders, claiming to be the standard.
AICC is an old standard for guiding - in an automatic way - individual learning behind a computer.
SCORM, the proposed standard from ADL, includes a subset of AICC.
Moodle at it's best facilitates with lots of tools human coaches in an internet learning environment.
Moodle stores data in a structured way in a database and can export the complete structure of a course and it's content into an XML-tree. So you can match the structure of the standard you use against this XML-tree with techniques like XSLT conversions.
(Of coure not all parts will match between these two structures until you use in both environments the same standard.)