About Tags
A Historian tag is used to store data related to a property.
For example, if you want to store the pressure, temperature, and other operating conditions of a boiler, a tag will be created for each one in Historian.
When you collect data using a collector, tags are created automatically in Historian to store these values. These tags are mapped with the corresponding properties in the source.
For example, suppose you want to store OSI PI data in Historian. You will specify the OSI PI tags for which you want to collect data. The OSI PI collector creates the corresponding tags in Historian, and it stores the values in those tags.
You can also choose to create tags manually (for example, to store the result of a calculation performed by the Calculation collector).