While working on MDL-30435 I was trying to restore http://openlearn.open.ac.uk/blocks/formats/logrequest.php?url=/file.php/2592/exports/MST209_1_imscc.zip in the recent Moodle 2.2dev. At very early stages of the conversion, when the manifest is being validated, I am getting this exception:

Error in /home/mudrd8mz/moodledata/moodle22/temp/backup/f9f2a42e10a2296e8cef5d6a9877b6e7/imsmanifest.xml: Element '

string', attribute 'language': 'x-t-cc-url' is not a valid value of the atomic type 'xs:language'. at line 88

Stack trace:

• line 96 of /backup/converter/imscc1/lib.php: imscc1_convert_exception thrown
• line 128 of /backup/converter/convertlib.php: call to imscc1_converter->execute()
• line 215 of /backup/util/helper/convert_helper.class.php: call to base_converter->convert()
• line 400 of /backup/controller/restore_controller.class.php: call to convert_helper::to_moodle2_format()
• line 35 of /backup/restore.php: call to restore_controller->convert()

This is because of the following line in imsmanifest.xml:

<imsmd:string language="x-t-cc-url">http://creativecommons.org/licenses/by-nc-sa/2.0/uk/</imsmd:string>

I don't know much about CC specification but some quick Googling results suggest that "x-t-cc-url" is a valid pseudo-language code. I need to know whether there is a bug in LMS CC XML schemas shipped with Moodle or if the package is actually broken.