Vidi dominum sedentem super solium

Folio: 
002r
Sequence: 
2
Feast: 
Genre: 
A
Cantus ID: 
005404
Mode: 
?
Manuscript Reading Full Text (standardized spelling): 
Vidi dominum sedentem super solium excelsum et elevatum et plena erat omnis terra majestate ejus et ea quae sub ipso erant replebant templum
Manuscript Reading Full Text (MS spelling): 
Vidi dominum sedentem super solium excelsum et plena erat omnis terra maiestate eius et ea quae
Indexing notes: 
"p" in "sup" has a symbol on it so I think it's a short form for "super". The manuscript indicates that this is an antiphon, however, the cantus index indicates that this is a responsory? Which is correct?