This class provides the representation for a tag assertion. Tag assertion is a statement made by a user to describe a tagging relation between two UserTag. For example, the user can made assertions to state that a given tag related to, narrower than, broader than, or is type of another tag.
Relationships are defined by TagProperty. Gnizr comes with a set of predefined TagProperty, which is defined by the gnizr database schema. Developers can create new property by introduce new tag property records in the database schema.
The ID of the TagProperty uniquely identifies a TagProperty. The ID is usually assigned by the database system when a TagProperty is created for the first time.
@author Harry Chen
@since 2.3