Relative and Absolute References
There are 2 types of references you can use in your tag:
Typically, relative references are used as they provide more flexibility and reduce the chances of references being broken.
When you select a tag from an Expression display, you can choose whether a reference is absolute or relative by using the Relative check box. If you select the Relative check box, the expression will use a relative reference and if you clear the check box, an absolute reference is used.
NOTE: Tags do not apply to Template expressions, instead you use Template Parameters.