tagging

Tagging is a term used in a number of contexts for different purposes, mostly referring to adding a tag of some form.

In many computing and information processing contexts, tagging is the process of labelling a piece of data with metadata.

Content on webpages is displayed as HTML which uses the construct of HTML tags
For instance, in linguistics, a corpus may undergo part-of-speech tagging.
It is also often used in relation to audio data compression, in which case it refers to adding ID3 tags or an equivalent to label a piece of music.

The simplest form of graffiti is a simple signature known as a tag, and is consequently referred to as tagging.
In sport it refers to passing control to another member of your team - for instance in professional wrestling.
The labelling of an object or person with RFID (or similar technology) is also known as tagging.
Tagging is also used in biochemistry where tags can serve multiple purposes. They can aid purification or detection. Tags can also be the basis for non-covalent construction of new nanostructures

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