Description:

Zend\Tag is a component suite which provides a facility to work with
taggable Items. As its base, it provides two classes to work with
Tags, Zend\Tag\Item and Zend\Tag\ItemList. Additionally, it comes with
the interface Zend\Tag\TaggableInterface, which allows you to use any
of your models as a taggable item in conjunction with Zend\Tag.

Zend\Tag\Item is a basic taggable item implementation which comes with
the essential functionality required to work with the Zend\Tag suite.
A taggable item always consists of a title and a relative weight (e.g.
number of occurrences). It also stores parameters which are used by
the different sub-components of Zend\Tag.

To group multiple items together, Zend\Tag\ItemList exists as an array
iterator and provides additional functionality to calculate absolute
weight values based on the given relative weights of each item in it.