---
title: Reference Values
description: Category IDs, supported languages and creator-owned tag normalization.
navigationTitle: Reference Values
---

# Reference Values

Reference values are now split for easier navigation:

- [Category IDs](https://docs.subnano.ai/v1/api/categories)
- [Language values](https://docs.subnano.ai/v1/api/languages)

## Tag name normalization

Tags are optional creator-owned names, separate from category IDs. Send names to
Post create/PATCH; reuse vocabulary from private `GET /api/v1/tags`. Responses
contain UUID-sorted `{id,profileId,name,collectionUrl}` objects. Names preserve case,
accents and Danish letters. Different creators' identical names remain separate.
Optional `slug` and `creatorHandle` fields describe the current readable address.
Slugs are saved and unique per creator; URL transliteration does not change tag names.

The canonicalizer applies NFC, then trims/collapses the following Unicode
White_Space characters to one ASCII space:

- U+0009–U+000D, U+0020, U+0085, U+00A0 and U+1680
- U+2000–U+200A, U+2028–U+2029, U+202F, U+205F and U+3000

Remaining control (`Cc`) and format (`Cf`) characters are rejected. Each canonical
name must contain 1–64 Unicode code points. Requests accept at most 10 **raw**
names, then deduplicate canonical names and sort by UTF-8 bytes. Assignment order
has no meaning. Omission preserves assignments on PATCH; `[]` clears; `null` is
invalid. Vocabulary survives assignment removal and Post deletion. No rename API
is provided. See [tags and examples](https://docs.subnano.ai/v1/api/posts#creator-owned-tags) and
[public collections](https://docs.subnano.ai/v1/api/buyer-discovery#browse-a-creators-tag-collection).