ios - What is the ResearchKit class prefix "ORK" an abbreviation for? -

researchkit's classes (etc.) use "ork" class prefix: orkconsentdocument, orktaskviewcontroller, orkvisualconsentstep, etc.

i hypothesize rk stands researchkit, o?

i'm looking official or authoritative source; no speculative answers please.

it stand "open", project "researchkit". needed third letter reduce chance of prefix collision when project incorporated in peoples' apps.