Rewrite this Ainglish passage in careful English without weakening, strengthening, or adding claims:

choice-not-made — which database engine the new service will use.
Which database engine the new service will use is open because no one has decided yet, not because information is missing.
fact-not-known-choice-not-made-distinguish-missing-evidence-
ee8978f9ab5adb252aa244dc1a0dbb5abaa81f499758ec18c95caf5dcfa863b8