> ## Documentation Index > Fetch the complete documentation index at: https://oxy.tech/docs/llms.txt > Use this file to discover all available pages before exploring further. # Semantic Type System, User Management, and Enhanced Chat Streaming > Introducing semantics.yml - a comprehensive approach to data modeling that unifies all entity definitions across your entire Oxygen deployment: **July 3, 2025** ### **Entity-First Unified Semantic Layer** Introducing `semantics.yml` - a comprehensive approach to data modeling that unifies all entity definitions across your entire Oxygen deployment: * **Automatic Semantic Collection** - Run `oxy sync` to bootstrap unified semantic definitions from all your models, then customize as needed * **Agent Integration** - Reference semantic types directly within agents or workflows using Jinja syntax with dimensions object, e.g., `{{ dimensions.month }}` * **Workflow Variables with JSON Schema** - Implement semantic type referencing as JSON Schema within workflow variables for structured validation * **Centralized Entity Management** - Entire semantic layer consolidated in `semantics.yml` for consistency across your deployment *Note: This is an early release feature and may encounter some edge cases during initial use.* Example of \[semantics.yml, which you can find in our public source code Image Image Image ### **User Management & Admin Controls** Complete user administration system with role-based access control: * **Admin Configuration** - Define administrators directly in `config.yml` with simple email list * **User Management Interface** - Access full user management at `/users` endpoint * **User Lifecycle Management** - Admins can delete and restore user accounts * **Role-Based Authorization** - Clear separation between admin and standard user capabilities Example \[config.yml, which you can find in our public source code: ```yaml theme={null} authentication: basic: smtp_user: example@gmail.com smtp_password_var: AUTH_SMTP_PASSWORD smtp_server: smtp.gmail.com smtp_port: 587 admins: - example1@oxygen-hq.com - example2@oxygen-hq.com ``` Users can then be managed at `your-deployment-url/users` Image ### **Revamped Management Interface** Database management and API Keys management UIs are slightly reworked to follow a unified design language with consistent styling and interaction patterns Image Image ### **Enhanced Chat Streaming Experience** Conversations with agents now persist seamlessly across page navigation and reloads, with improved first message flow for smoother user experience Image ### Document update Added more endpoints to the API reference. Visit `your-deployment-url/apidoc` for a closer look at our latest Openapi documentation Image ### **Other Improvements** Updated to Rust 1.88 (latest version), resolved ClickHouse stability issues, and improved artifact panel scrolling behavior. Enhanced dependency management for better overall platform reliability