Unicode Block - Tags

Tags is a collection of invisible format characters used to tag or label pieces of text for special processing, primarily in the context of language identification and script tagging within plain text streams. Each of these control characters represents a single tag, such as a language code, and is designed to be used in sequences that apply a specific tag to a following portion of text, though the entire mechanism is deprecated for general use. The tags are intended to be ignored when rendering text, serving only as metadata, and they are all defined as default ignorable, meaning they do not affect visible output. Their primary historical application was for language tagging in conjunction with ISO 15924 script codes, but modern Unicode standards recommend alternative methods for such metadata.