website/docs/concepts/overview/working-with-objects/names.md

approvers	title
mikedanese thockin	Names

All objects in the Kubernetes REST API are unambiguously identified by a Name and a UID.

For non-unique user-provided attributes, Kubernetes provides labels and annotations.

See the identifiers design doc for the precise syntax rules for Names and UIDs.

Names

{% glossary_definition term_id="name" length="all" %}

By convention, the names of Kubernetes resources should be up to maximum length of 253 characters and consist of lower case alphanumeric characters, -, and ., but certain resources have more specific restrictions.

UIDs

{% glossary_definition term_id="uid" length="all" %}