It is mentioned in the description. In this manuscript (and in others too) the well common ending of the melody is sometimes omitted. This is the case with the Alleluia Dominus in Sina (www.e-codices.ch/en/csg/0359/116) I took the missing neums from the same manuscripts, but other Alleluia: Dominus dixit ad me (www.e-codices.ch/en/csg/0359/38).
What is the difference between the red notation and the purple notation? Did you use a special font for them?
It is mentioned in the description. In this manuscript (and in others too) the well common ending of the melody is sometimes omitted. This is the case with the Alleluia Dominus in Sina (www.e-codices.ch/en/csg/0359/116) I took the missing neums from the same manuscripts, but other Alleluia: Dominus dixit ad me (www.e-codices.ch/en/csg/0359/38).