On grammatical class:

ve'a
location tense interval: a small/medium region of space.
ve'e
location tense interval: the whole of space.
ve'i
location tense interval: a tiny region of space.
ve'u
location tense interval: a large region of space.

In definition:

cmavrve'a
x1 is the selma'o "VEhA".

In notes:

ve'arda
x1 is a part of Lojban text representing rule 'space-interval' according to the first edition of the book 'The Complete Lojban Language'.