The XML Namespace used by Moodle for the XML messages required for LTI 1.1 grade exchange are incorrect because the code was based on the final draft of LTI 1.1 and not the actual final version of the spec. The namespace was changed between the drafts. The early IMS LTI Certification tests allowed for either the new or old namespace to allow for a transition. But for Moodle that transition was never made and we have kept the wrong namespace from 2.2 through 2.5.

This is the wrong namespace:

http://www.imsglobal.org/lis/oms1p0/pox

This is the right namespace:

http://www.imsglobal.org/services/ltiv1p1/xsd/imsoms_v1p0

The newest version of the certification will now demand the proper namespace so we should get this fixed so as to be compliant with the updated certification tests.