# Configure readable IDs with taxonomy

Set team numbering and optional project-specific sequences for work items.

Taxonomy assigns readable custom IDs to experiments, ideas, and insights. Team taxonomy supplies a default across projects; project taxonomy is an optional override.

## Configure team or project taxonomy

1. Open **Settings → Organization → Taxonomy** for the team's defaults, or **Settings → Project → Taxonomy** for the selected project.
2. Open the section for Experiments, Ideas, or Insights.
3. Edit the scheme's name, template, and next number, or create a project taxonomy where none exists.
4. Review **Preview** and save.

Without a configured project section, new work uses the team taxonomy and global ID scope. Confirm the intended scope before creating a separate project sequence.

![Team taxonomy settings for experiments showing the readable-ID template, next sequence number, and generated EXP-0001 preview.](https://conversionlab.app/docs/images/workflows/taxonomy.webp)

## Build a template

| Variable         | Meaning                                                 |
| ---------------- | ------------------------------------------------------- |
| `{number}`       | Next sequence number                                    |
| `{number:0000}`  | Sequence number padded with zeroes                      |
| `{year}`         | Current four-digit year                                 |
| `{entity}`       | EXP, IDEA, or INS                                       |
| `{project_code}` | Project code; frozen when a project sequence is created |

For example, `{entity}-{number:0000}` produces IDs such as `EXP-0021`. Preview the actual output before saving, especially when combining team and project naming conventions.

## Assign IDs to existing records

The backfill action assigns IDs to eligible existing work. Inspect the scheme and selected scope before running it. Changing a template governs the numbering configuration; do not assume it rewrites every already assigned ID.

Custom IDs help people refer to work. They are separate from the numeric resource IDs used by the [REST API](https://conversionlab.app/docs/developer/api).