> For the complete documentation index, see [llms.txt](https://swimlane.gitbook.io/ngx-datatable/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://swimlane.gitbook.io/ngx-datatable/api/column/internals.md).

# Internals

## Ids

Each row is decorated with a `$$id` attribute. This allows us to track the column for faster change detection/etc.