Are There Existing Metadata Standards For Icon/vector Datasets Used In ML Or Technical Workflows?

Hi everyone,

I’ve been working on cleaning and organizing a set of visual assets (icons, small diagrams, SVG symbols) for my own ML/technical projects, and I noticed that most existing icon libraries don’t really follow a shared metadata structure.

What I’ve seen is that metadata usually focuses on keywords for visual search, but rarely includes things like: • consistent semantic categories • usage-context descriptions • relationships between symbols • cross-library taxonomy alignment

Before I go deeper into structuring my own set, I’m trying to understand whether this is already a solved problem or if I’m missing an existing standard.

So I’d love to know: 1. Are there known datasets or standards that define semantic/structured metadata for visual symbols? 2. Do people typically create their own taxonomies internally? 3. Is unified metadata across icon sources something practitioners actually find useful? Not promoting anything — just trying to avoid reinventing the wheel and understand current practice.

Any insights appreciated 🙏