> ## Documentation Index
> Fetch the complete documentation index at: https://developers.techwolf.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

Subdomains in the Skill Engine API allow enterprise customers to adapt
Subdomains in their Taxonomy.

<Warning>
  By default, **Subdomains are disabled**. The 3-level Taxonomy only consists of
  Domains, Skill Clusters and Skills. Enabling Subdomains allows a 4-level
  Taxonomy consisting of Domains, Subdomains, Skill Clusters and Skills. To enable
  Subdomains on your tenants, contact [support@techwolf.ai](mailto:support@techwolf.ai)!
</Warning>

[Custom Properties](</reference/latest/Custom Properties/CustomPropertiesDefinitions>) are supported for this
entity.