The tags license is required to use the TagDictionaryService and tag dictionaries on a station. The Dictionary.limit attribute limits the number of tag dictionaries available for the system. Any dictionaries added above the limit for the license will be in fault. When a dictionary is in fault, the tags in that dictionary are not available in the Edit Tags dialog. By default, you are limited to the first two tag dictionaries. However, the Dictionary.limit attribute is configurable on the license in the same manner as are device limits.

For more licensing information, see licensing topics in the Niagara Platform Guide.