Modify rule in OData ABNF to read:
guid = "guid" SQUOTE 8HEXDIG "" 4HEXDIG "" 4HEXDIG "" 4HEXDIG "" 12HEXDIG SQUOTE
Resolved in https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/ABNF/odata-abnf-current.abnf?rev=10
Accepted: https://www.oasis-open.org/committees/download.php/46979/odata_meeting-5_on-20120830_minutes.html
Current rule lacks one hexdig quadruple
guid = "guid" SQUOTE 8*HEXDIG "" 4*HEXDIG "" 4*HEXDIG "-" 12*HEXDIG SQUOTE