RouteObjects This document defines Contextual IP Prefix Semantics (CIPS), a model that distinguishes addresses, canonical prefixes, addresses with prefix context, and prefix selectors, and describes how these forms are qualified by operational context. It provides a taxonomy of operational contexts and vocabulary for stating implementation support. In that vocabulary, canonical-prefix support means the canonical prefix form is preserved as its own identity; accepting slash-qualified text is not that capability. The model is intended to help specification authors, API and schema designers, tool authors, and operators preserve semantic distinctions when prefix- bearing values cross interchange boundaries.