Angelina YangFounder and Host, TwoSetAI · AI builder for visibility and discoverability

How Metadata is Stored in Vector Databases | RAG, LLMs, and AI Systems Explained

10 Sept 2025 · 1 min

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Angelina Yang explains how vector databases store metadata. Metadata typically stays as text or tags in an object, not embedded. Some databases may internally embed metadata for filtering, but the standard practice is keeping it as plain text.

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How are metadata saved and embedded? No, metadata is not going to be embedded necessarily. We are going to store them in the vector database. They could be stored as just tags. So when we are doing filtering, depending on the technique and the vector database internal mechanism to do that filtering, they could even potentially embed them. But we don't explicitly embed them. Right. We just store them as text. Right. The metadata is like an object dictionary of different properties. So we don't just embed them just like the actual text. For text, we have to do it metadata. We don't.