> For the complete documentation index, see [llms.txt](https://help.arkance-systems.com/class-feeder/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.arkance-systems.com/class-feeder/eng/manual/element-classification/facet-selection.md).

# Facet Selection

The active facet can be selected form the drop-down menu. CCI classification consists of these facets:

* Construction entities
* Spaces
* Functional systems
* Technical systems
* Components

Classification tables are displayed according to selected facet. Element categories are also filtered based on the selected facet (some elements are not elegible to be classified by some facets).

<figure><img src="/files/SwdCSXI6w62ZUDHBnKI6" alt=""><figcaption><p>Facet selection</p></figcaption></figure>