Gateway Domain-Centric Routing (GDCR): A Vendor-Agnostic Metadata-Driven Architecture for Enterprise API Governance — The Gateway Standard — Version 7.0

GDCR — Gateway Domain-Centric Routing The Essentials in 7 Lines Step What to do 1 Create one proxy per domain — e. g. , /sales/*, /finance/* 2 Use optional subdomains to organize processes — e. g. , /sales/o2c/orders 3 Store routes in KVM (metadata) — e. g. , gdcrorderscsalesforceid01: http 4 Let DDCR resolve — 7 stages, 2M validated requests, zero failures 5 Copy the code from the official repository — github. com/rhviana/deip 6 Generate strings for each vendor — 10 seconds per entry, 50 vendors in minutes 7 Run the proxy — and never touch it again. Every change becomes metadata. Done. 7 steps. 30 seconds reading. Zero PowerPoint. Why it works Immutable proxy → created once, never changed Mutable metadata → new vendor = new line in KVM Deterministic DDCR → same math, 2M requests, zero failures Open source code → copy, paste, adapt, run What is GDCR? Gateway Domain-Centric Routing (GDCR) is a vendor-neutral, technology-agnostic approach to enterprise API governance that maps API calls to backend systems based on business-domain semantics rather than on static endpoint bindings or vendor-specific API designs. Unlike traditional integration approaches — where every new backend necessitates a new proxy — GDCR's proxy, policy enforcement points, and routing engine remain immutable. Adding a new vendor requires only a metadata update: no proxy modification, no redeployment, no downtime. GDCR uses the DDCR Engine (Domain Driven Centric Router) to route API calls through a deterministic 7-stage lifecycle — Parse → Normalize → Lookup → Route — in which semantic paths are extracted, action verbs normalized into 15 canonical codes, and backend targets resolved exclusively from KVM metadata registered by an administrator. Validated across 13 configurations · 8 enterprise platforms · 5 programming languages · 42 IoT sensors · 4 IoT environments — ~2, 067, 904 requests processed · 100% routing accuracy · zero routing failures · sub-4ms DDCR resolution latency. GDCR is the gateway layer of the SDIA (Semantic Domain Integration Architecture) ecosystem. This document covers the gateway facade, the DDCR resolution engine, the KVM metadata schema, the ABNF semantic URL grammar, the security model, and action normalization. Orchestration topology (ODCP), event fabric governance (DCEP), and the complete ecosystem specification (SDIA/DEIP) are covered in companion documents. GDCR is composed of: Domain structure — major business areas (finance, sales, logistics) Semantic façades — stable, meaningful entry points Governance and identity boundaries — clear ownership and policy Metadata model — portable, deterministic representation DDCR engine — runtime resolution component that makes the model operational DDCR defines the semantic control logic that brings order, consistency, and determinism to enterprise integration. The domain never lies. 🧠 DDCR Engine — A Mathematical Breakthrough DDCR (Domain Driven-Centric Router) is a deterministic semantic routing mechanism based on pure mathematical principles. In validation, the engine never failed across approximately ~2, 067, 904 requests, implemented in five programming languages and validated across eight technical platforms. Languages: JavaScript · Lua · Java · Python · C#API Gateways: SAP BTP APIM · Kong Gateway · Kong on Kubernetes · Netflix Zuul · AWS API Gateway · Azure API ManagementOrchestration: SAP BTP Integration Suite (CPI) Metadata Stores: SAP KVM · Redis standalone · Redis on Kubernetes · Java static HashMapInfrastructure: Kubernetes · Istio Service Mesh · DockerIoT Stack: Mosquitto MQTT · Node-RED · Python MQTT publisher · 42 sensors · 4 environments 🌍 Simple Orientation In the simplest possible way, GDCR means that a company should be easy to understand from the outside, even if it is complex on the inside. People should reach what they need by meaning, not by hidden structure. Real-World Analogy What It Means Hospital A patient goes to cardiology, emergency, or pediatrics — not to "Building B, Room 47" Airport A traveler follows departures, arrivals, or baggage claim — not electrical wiring or staff routes University A student finds admissions, library, or finance — not which office moved last month That is the idea of GDCR. The outside should be organized by clear domains of meaning, while the inside can remain complex, distributed, and controlled. 📦 Composition of GDCR Component Role Domain Structure Major business areas through which enterprise capabilities are organized Semantic Façade Clear external entry point representing a domain capability Governance & Identity Controlled identity, ownership, and consistent policy boundaries Metadata Model Domain meaning, identity, policy, and relationships in portable form DDCR Engine Runtime resolution component that makes GDCR executable GDCR defines the organized domain-based structure. DDCR resolves that structure operationally at runtime. 📚 Version History Version Status DOI / Link v7. 0 ✅ CURRENT — Stable Release 10. 5281/zenodo. 18582492 v6. 0 ⚠️ DEPRECATED (maintained for reference only) 10. 5281/zenodo. 18836272 · Figshare Previous versions ❌ Deprecated — Version 7. 0 supersedes all previous versions. Previous versions are deprecated and maintained for reference only. 🔗 Links Repository: github. com/rhviana/gdcr GDCR v7. 0 (Zenodo): 10. 5281/zenodo. 18582492 DEIP (Validation Source of Truth): 10. 5281/zenodo. 19004802 GDCR v6. 0 (Deprecated): 10. 5281/zenodo. 18836272 📖 Citation (v7. 0) APA: Viana, R. L. H. (2026). Gateway Domain-Centric Routing (GDCR) — Version 7. 0. Zenodo. https: //doi. org/10. 5281/zenodo. 18582492 BibTeX: bibtex @articleviana2026gdcr7, title = {Gateway Domain-Centric Routing (GDCR): A Vendor-Agnostic Metadata-Driven Architecture for Enterprise API Governance — v7. 0 Edition, author = Viana, Ricardo Luz Holanda, year = 2026, doi = 10. 5281/zenodo. 18582492, url = https: //doi. org/10. 5281/zenodo. 18582492 } 👤 Author Ricardo Luz Holanda VianaEnterprise Integration Architect | SAP BTP Integration Suite Expert | SAP Press e-Bite Author LinkedIn: linkedin. com/in/ricardo-viana-br1984 Medium: medium. com/@rhviana ORCID: 0009-0009-9549-5862