site:openai.com OR site:help.openai.com OR site:developers.openai.com ChatGPT Search content quality citations sources authority entities structured data schema exact quote official OpenAI

The strongest official OpenAI results focus on how ChatGPT Search retrieves current information and presents citations. The results do not show official guidance claiming that schema markup, structured data, or entity optimization directly improves inclusion or ranking in ChatGPT Search.

• Web Search API guide: Explains web retrieval, sourced answers, URL citations, source lists, and domain filtering.
• Citation Formatting guide: Covers citable units, source representation, citation instructions, validation, and rendering.
• ChatGPT Search help article: Explains how users access Search and receive timely answers linked to relevant web sources.
• Deep Research guide: Documents research across the public web, selected websites, uploaded files, and connected apps, producing reports with citations.
• ChatGPT Search announcement: Introduces conversational web search with links to relevant sources.

There is insufficient official evidence in these results for a specific ChatGPT Search ranking formula based on authority signals, entities, schema markup, or exact-quote matching. Those may support general discoverability and machine readability, but OpenAI does not establish them here as direct ranking factors.