AdpType: adposition type
Prep: preposition
Examples: in, on, to, from
Post: postposition
Examples: German “entlang” in “der Strasse entlang” (along the street)
Circ: circumposition
Examples: German “von … an” in “von dieser Stelle an” (from this place on)
Voc: vocalized preposition
In Slavic languages, some prepositions are non-syllabic and their form has to be changed in some contexts to facilitate pronunciation.
Czech examples: ke, ku, se, ve, ze
(Non-vocalized equivalents are: k, k, s, v, z)
Same phenomenon exists in Slovak, Russian and probably elsewhere.