Tag syntax guidelines

The data type of the tag must come before the name of the tag.
When no value is specified, the default values for tags are defined by the data type.
Alias tags cannot set the default value.
FactoryTalk Design Studio applies these rules when writing out tags:
If there is a property on a tag, tag member, bit, or array element, a curly bracket contains the property. For example:
For tag members, if there is no property on the parent of the member, then no curly bracket is used. For example:

      tag dint MyTag { desc := “hello”; }
      tag timer mytimer { 
        len := 10; 
        pre {  
          desc := “desc on pre”; 
        } := 10; 
   
      } 
      tag timer mytimer { 
        len := 10; 
        pre.1 { 
          desc := “desc on pre.1”; 
        } := 10; 
      }