Tags are [JSup] variables used to handle / exchange / store / process data. They hold a data of some [JSup Tag type|type] and can be used directly or in expressions in [JSup Graphic objects|graphic object] [JSup Animations|Animation] or other [JSup code].

Some [JSup System tags|system tags] are always defined and not changeable, the others are created by the [JSup application] developer as necessary or [JSup Tag advanced reference#Tags import/export|imported] by external systems.

A tag has many properties/attributes that define it:

• The [JSup domains|domain] it belongs to.
• The name: an [JSup unique names|unique name] that identify it.
• The [JSup Tag type|type], which determines the type of data the tag will hold.
• The [JSup Tag classes|tag class] that determines many behaviours and properties of the tag.
• The [JSup alarm groups|alarm group] that let you to group tag and their related [JSup tag alarms|alarms] by physical or logical areas (or other kind of category).
• [IOHook|I/O hook(s)] that connect the tag with some remote device item.

About tags

• [JSup Tag list dialog|Tag List dialog]
• [JSup Tag dialog|Tag dialog]
• [JSup Tag IO definition|Tag I/O definition]
• [JSup Using tag properties|Using tag properties]
• [JSup tag initial value|Tag initial value]
• [JSup tag quality]
• [JSup cross reference]
• [JSup Tag advanced reference|Tag advanced reference]