About Tags and the Project Database • Time tags hold the current time in string format Most system tags are read-only , which means you cannot add, edit, or remove these tags from the database. To see a list of the system tags, select the Global tab in the Project Explorer , open the System Tags folder, and open the Tag List subfolder. After creating a tag, you can use it anywhere within the project, and you can use the same tag for more than one object or attribute. Page 46