In GN4 you can use >writes...< to display any page or edition attribute on a master page. However, the GNML tag scripting, similar to how it was in GN3, can be applied through a combination of auto-computed attributes and VB.Net scripts.
Note: this applies to the GN4 version 1.6.1970.x and newer, and it works only on master pages.
Use the Table of Contents to find information. See also Using table of contents in help.