NOTE: Tags do not apply to Template expressions, instead you use Template Parameters.
OPC tags represent the properties of database items, including their configuration field properties. To insert an OPC tag in an expression, you can either type in the tag manually, or you can use the Select Tag window.
To use the browse button to insert a tag, see Selecting an OPC Property Tag.
To enter an OPC tag manually, see Syntax of OPC Property Tags.