vector logo, svg-friendly, flat, minimal, geometric, no shading, no texture, no lighting, simple paths, low detail, high contrast, icon design, app icon, central circular "O" symbol, inner split shape (like a door or page), two small symmetric angle brackets "< >" on left and right, hexagon or rounded square container, blue to purple gradient (single gradient only), dark background, clean, modern, software engineering aesthetic, knowledge graph concept, balanced, symmetric composition