The Silicon Integration Initiative (Si2) AI/ML Schema/Ontology Working Group announced the public release of its AI for EDA Ontology Repository, providing the semiconductor design community with an ontology and use cases to enable EDA agentic system experimentation. The repository is available under the Apache 2.0 open-source license and includes the EDA ontology (TTL/OWL), documented and validated use cases developed by Arizona State University and Drexel University, ontology validation collateral, an MCP server supporting agent discovery and reasoning, and a full documentation package. The repository is available on GitHub at https://github.com/si2org/aiml_schema_ontology. The working group involves Siemens EDA, Arizona State University, Drexel University, IBM, NC State University, NXP, Qualcomm, and Synopsys. The group aims to foster industry-wide collaboration, accelerate innovation in agentic EDA systems, and establish a common semantic foundation for AI-enabled semiconductor design workflows.