Merge pull request #690 from IABTechLab/gwh-APIDOCS-2456-07-minor-upd…

…ate-token-def-for-jn 

add statement to glossary def for token

docs/ref-info/glossary-uid.md

@@ -460,6 +460,7 @@ import Link from '@docusaurus/Link';
 <dt><MdxJumpAnchor id="gl-uid2-token"><a href="#gl-uid2-token">UID2 Token (Advertising Token)</a></MdxJumpAnchor></dt>
 <dd>A Unified ID 2.0 (UID2) token, also called an advertising token, is an encrypted form of a <a href="#gl-raw-uid2">raw UID2</a>.</dd>
 <dd>UID2 tokens are generated from hashed or unhashed email addresses or phone numbers that are converted to raw UID2s and then encrypted. The UID2 token is a unique value; no two UID2 tokens are the same. UID2 tokens are case sensitive.</dd>
+<dd>The token value is opaque: No assumptions can be made about the format or about the length of the string.</dd>
 <dd>The token has a limited life, but can be refreshed in the background using the <a href="#gl-refresh-token">refresh token</a>.</dd>
 <dd>Publishers send UID2 tokens in the bidstream.</dd>
 <dd>For details, see <a href="../intro#uid2-identifier-types">UID2 Identifier Types</a>.</dd>