diff --git a/registries/_format/uuid.md b/registries/_format/uuid.md
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+++ b/registries/_format/uuid.md
@@ -0,0 +1,31 @@
+---
+owner: MikeRalphson
+description: UUID v4 (RFC4122)
+issue: 845
+base_type: string
+layout: default
+---
+
+# <a href="..">{{ page.collection }}</a>
+
+## {{ page.slug }} - {{ page.description }}
+
+Base type: `{{ page.base_type }}`.
+
+The `{{page.slug}}` format represents a UUID v4 value, as defined by [RFC4122](https://tools.ietf.org/html/rfc4122)
+
+### Example
+
+```yaml
+ItemUUID:
+  type: string
+  description: the UUID v4 value relating to the item.
+  format: uuid
+  example: f81d4fae-7dec-11d0-a765-00a0c91e6bf6
+```
+
+{% if page.issue %}
+### GitHub Issue
+
+* [#{{ page.issue }}](https://github.com/OAI/OpenAPI-Specification/issues/{{ page.issue }})
+{% endif %}