# My ontology is not ready for OBO Foundry, can I reserve a prefix anyway?

If your ontology is not eligible for inclusion in the OBO Foundry you can not directly reserve a prefix (Ontology ID) in the OBO Foundry. However, if you want to make sure that no one uses your prefix, you can register your prefix at the Bioregistry. The updated OBO policy on IDs ensures that new prefix requests must not clash with existing prefixes registered at the Bioregistry.

Note: when making a OBO Foundry New Ontology Request which conflicts with a previously registered prefix at one of the registries listed by the OBO policy on IDs, you will be asked to provide evidence that the submitted ontology and the previously submitted prefix (i.e. at the Bioregistry) indeed refer to the same resource.