> ## 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

Custom Properties within the Skill Engine API offer users the capability to
finely customize attributes for a wide array of entities, including:

* [taxonomy/domains](/reference/latest/Taxonomy/TaxonomyDomains)
* [taxonomy/subdomains](/reference/latest/Taxonomy/TaxonomySubdomains)
* [taxonomy/skill\_clusters](/reference/latest/Taxonomy/TaxonomySkillClusters)
* [taxonomy/skills](/reference/latest/Taxonomy/TaxonomySkills)
* [employees](/reference/latest/Employees)
* [organisational\_units](</reference/latest/Organisational Structure/OrganisationalUnits>)
* [job\_architecture/job\_families](</reference/latest/Job Families>)
* [job\_architecture/jobs](/reference/latest/Jobs)
* [vacancies](/reference/latest/Vacancies)
* [courses](/reference/latest/Courses)
* [skill\_clusters](</reference/latest/Skill Clusters>)
* [companies](</reference/latest/External Companies>)

More info about entities can be found on the
[How it Works page](/technology/entities/).